CVE-2026-23113

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23113", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.968Z", "datePublished": "2026-02-14T15:09:46.379Z", "dateUpdated": "2026-11-10T12:41:51.915Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:00:22.445Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop\n\nCurrently this is checked before running the pending work. Normally this\nis quite fine, as work items either end up blocking (which will create a\nnew worker for other items), or they complete fairly quickly. But syzbot\nreports an issue where io-wq takes seemingly forever to exit, and with a\nbit of debugging, this turns out to be because it queues a bunch of big\n(2GB - 4096b) reads with a /dev/msr* file. Since this file type doesn't\nsupport ->read_iter(), loop_rw_iter() ends up handling them. Each read\nreturns 16MB of data read, which takes 20 (!!) seconds. With a bunch of\nthese pending, processing the whole chain can take a long time. Easily\nlonger than the syzbot uninterruptible sleep timeout of 140 seconds.\nThis then triggers a complaint off the io-wq exit path:\n\nINFO: task syz.4.135:6326 blocked for more than 143 seconds.\n Not tainted syzkaller #0\n Blocked by coredump.\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:syz.4.135 state:D stack:26824 pid:6326 tgid:6324 ppid:5957 task_flags:0x400548 flags:0x00080000\nCall Trace:\n <TASK>\n context_switch kernel/sched/core.c:5256 [inline]\n __schedule+0x1139/0x6150 kernel/sched/core.c:6863\n __schedule_loop kernel/sched/core.c:6945 [inline]\n schedule+0xe7/0x3a0 kernel/sched/core.c:6960\n schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75\n do_wait_for_common kernel/sched/completion.c:100 [inline]\n __wait_for_common+0x2fc/0x4e0 kernel/sched/completion.c:121\n io_wq_exit_workers io_uring/io-wq.c:1328 [inline]\n io_wq_put_and_exit+0x271/0x8a0 io_uring/io-wq.c:1356\n io_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203\n io_uring_cancel_generic+0x69c/0x9a0 io_uring/cancel.c:651\n io_uring_files_cancel include/linux/io_uring.h:19 [inline]\n do_exit+0x2ce/0x2bd0 kernel/exit.c:911\n do_group_exit+0xd3/0x2a0 kernel/exit.c:1112\n get_signal+0x2671/0x26d0 kernel/signal.c:3034\n arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337\n __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]\n exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75\n __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]\n syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]\n syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]\n syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]\n do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fa02738f749\nRSP: 002b:00007fa0281ae0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca\nRAX: fffffffffffffe00 RBX: 00007fa0275e6098 RCX: 00007fa02738f749\nRDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa0275e6098\nRBP: 00007fa0275e6090 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fa0275e6128 R14: 00007fff14e4fcb0 R15: 00007fff14e4fd98\n\nThere's really nothing wrong here, outside of processing these reads\nwill take a LONG time. However, we can speed up the exit by checking the\nIO_WQ_BIT_EXIT inside the io_worker_handle_work() loop, as syzbot will\nexit the ring after queueing up all of these reads. Then once the first\nitem is processed, io-wq will simply cancel the rest. That should avoid\nsyzbot running into this complaint again."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/io-wq.c"], "versions": [{"version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "27e47500fac23d15b7dc93ff650bc4844d2581bd", "status": "affected", "versionType": "git"}, {"version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "d05d99573f81a091547b1778b9a50120f5d6c68a", "status": "affected", "versionType": "git"}, {"version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "85eb83694a91c89d9abe615d717c0053c3efa714", "status": "affected", "versionType": "git"}, {"version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "2e8ca1078b14142db2ce51cbd18ff9971560046b", "status": "affected", "versionType": "git"}, {"version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "bdf0bf73006ea8af9327cdb85cfdff4c23a5f966", "status": "affected", "versionType": "git"}, {"version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "10dc959398175736e495f71c771f8641e1ca1907", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/io-wq.c"], "versions": [{"version": "5.12", "status": "affected"}, {"version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.122", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.68", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.8", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.6.122"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.12.68"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.18.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/27e47500fac23d15b7dc93ff650bc4844d2581bd"}, {"url": "https://git.kernel.org/stable/c/d05d99573f81a091547b1778b9a50120f5d6c68a"}, {"url": "https://git.kernel.org/stable/c/85eb83694a91c89d9abe615d717c0053c3efa714"}, {"url": "https://git.kernel.org/stable/c/2e8ca1078b14142db2ce51cbd18ff9971560046b"}, {"url": "https://git.kernel.org/stable/c/bdf0bf73006ea8af9327cdb85cfdff4c23a5f966"}, {"url": "https://git.kernel.org/stable/c/10dc959398175736e495f71c771f8641e1ca1907"}], "title": "io_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-11-10T12:41:51.915Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-23113", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T21:19:36.113336Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T21:23:17.457Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}], "x_adpType": "supplier", "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-11-10T12:41:51.915Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-23113", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T21:19:36.113336Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T21:19:37.109Z"}}], "cna": {"title": "io_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "27e47500fac23d15b7dc93ff650bc4844d2581bd", "versionType": "git"}, {"status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "d05d99573f81a091547b1778b9a50120f5d6c68a", "versionType": "git"}, {"status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "85eb83694a91c89d9abe615d717c0053c3efa714", "versionType": "git"}, {"status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "2e8ca1078b14142db2ce51cbd18ff9971560046b", "versionType": "git"}, {"status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "bdf0bf73006ea8af9327cdb85cfdff4c23a5f966", "versionType": "git"}, {"status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "lessThan": "10dc959398175736e495f71c771f8641e1ca1907", "versionType": "git"}], "programFiles": ["io_uring/io-wq.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.12"}, {"status": "unaffected", "version": "0", "lessThan": "5.12", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.203", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.167", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.122", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.68", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.8", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["io_uring/io-wq.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/27e47500fac23d15b7dc93ff650bc4844d2581bd"}, {"url": "https://git.kernel.org/stable/c/d05d99573f81a091547b1778b9a50120f5d6c68a"}, {"url": "https://git.kernel.org/stable/c/85eb83694a91c89d9abe615d717c0053c3efa714"}, {"url": "https://git.kernel.org/stable/c/2e8ca1078b14142db2ce51cbd18ff9971560046b"}, {"url": "https://git.kernel.org/stable/c/bdf0bf73006ea8af9327cdb85cfdff4c23a5f966"}, {"url": "https://git.kernel.org/stable/c/10dc959398175736e495f71c771f8641e1ca1907"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop\n\nCurrently this is checked before running the pending work. Normally this\nis quite fine, as work items either end up blocking (which will create a\nnew worker for other items), or they complete fairly quickly. But syzbot\nreports an issue where io-wq takes seemingly forever to exit, and with a\nbit of debugging, this turns out to be because it queues a bunch of big\n(2GB - 4096b) reads with a /dev/msr* file. Since this file type doesn't\nsupport ->read_iter(), loop_rw_iter() ends up handling them. Each read\nreturns 16MB of data read, which takes 20 (!!) seconds. With a bunch of\nthese pending, processing the whole chain can take a long time. Easily\nlonger than the syzbot uninterruptible sleep timeout of 140 seconds.\nThis then triggers a complaint off the io-wq exit path:\n\nINFO: task syz.4.135:6326 blocked for more than 143 seconds.\n Not tainted syzkaller #0\n Blocked by coredump.\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:syz.4.135 state:D stack:26824 pid:6326 tgid:6324 ppid:5957 task_flags:0x400548 flags:0x00080000\nCall Trace:\n <TASK>\n context_switch kernel/sched/core.c:5256 [inline]\n __schedule+0x1139/0x6150 kernel/sched/core.c:6863\n __schedule_loop kernel/sched/core.c:6945 [inline]\n schedule+0xe7/0x3a0 kernel/sched/core.c:6960\n schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75\n do_wait_for_common kernel/sched/completion.c:100 [inline]\n __wait_for_common+0x2fc/0x4e0 kernel/sched/completion.c:121\n io_wq_exit_workers io_uring/io-wq.c:1328 [inline]\n io_wq_put_and_exit+0x271/0x8a0 io_uring/io-wq.c:1356\n io_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203\n io_uring_cancel_generic+0x69c/0x9a0 io_uring/cancel.c:651\n io_uring_files_cancel include/linux/io_uring.h:19 [inline]\n do_exit+0x2ce/0x2bd0 kernel/exit.c:911\n do_group_exit+0xd3/0x2a0 kernel/exit.c:1112\n get_signal+0x2671/0x26d0 kernel/signal.c:3034\n arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337\n __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]\n exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75\n __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]\n syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]\n syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]\n syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]\n do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fa02738f749\nRSP: 002b:00007fa0281ae0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca\nRAX: fffffffffffffe00 RBX: 00007fa0275e6098 RCX: 00007fa02738f749\nRDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa0275e6098\nRBP: 00007fa0275e6090 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fa0275e6128 R14: 00007fff14e4fcb0 R15: 00007fff14e4fd98\n\nThere's really nothing wrong here, outside of processing these reads\nwill take a LONG time. However, we can speed up the exit by checking the\nIO_WQ_BIT_EXIT inside the io_worker_handle_work() loop, as syzbot will\nexit the ring after queueing up all of these reads. Then once the first\nitem is processed, io-wq will simply cancel the rest. That should avoid\nsyzbot running into this complaint again."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.203", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.167", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.122", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.68", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.8", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19", "versionStartIncluding": "5.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:00:22.445Z"}}}, "cveMetadata": {"cveId": "CVE-2026-23113", "state": "PUBLISHED", "dateUpdated": "2026-11-10T12:41:51.915Z", "dateReserved": "2026-01-13T15:37:45.968Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-02-14T15:09:46.379Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["io_uring/io-wq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "27e47500fac23d15b7dc93ff650bc4844d2581bd", "status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "versionType": "git"}, {"lessThan": "d05d99573f81a091547b1778b9a50120f5d6c68a", "status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "versionType": "git"}, {"lessThan": "85eb83694a91c89d9abe615d717c0053c3efa714", "status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "versionType": "git"}, {"lessThan": "2e8ca1078b14142db2ce51cbd18ff9971560046b", "status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "versionType": "git"}, {"lessThan": "bdf0bf73006ea8af9327cdb85cfdff4c23a5f966", "status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "versionType": "git"}, {"lessThan": "10dc959398175736e495f71c771f8641e1ca1907", "status": "affected", "version": "c60eb049f4a19ddddcd3ee97a9c79ab8066a6a03", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["io_uring/io-wq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.12"}, {"lessThan": "5.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.203", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.167", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.122", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.68", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"affectedData": [{"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "405C58E5-6DB2-4F7A-9D83-41C17D9DA63B", "versionEndExcluding": "6.6.122", "versionStartIncluding": "5.12.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "52F38E19-0FDD-4992-9D6D-D4169D689598", "versionEndExcluding": "6.12.68", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E65C6E79-7EBE-4C77-93F0-818CF5B38F4E", "versionEndExcluding": "6.18.8", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.12:-:*:*:*:*:*:*", "matchCriteriaId": "75EB504D-4A83-4C67-9C8D-FD9C6C8EB4CD", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.12:rc7:*:*:*:*:*:*", "matchCriteriaId": "06AE06A6-A0C3-4556-BFFA-3D6E4BAC43C8", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.12:rc8:*:*:*:*:*:*", "matchCriteriaId": "FCE63934-38CF-4311-AD72-624E86AF3889", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*", "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop\n\nCurrently this is checked before running the pending work. Normally this\nis quite fine, as work items either end up blocking (which will create a\nnew worker for other items), or they complete fairly quickly. But syzbot\nreports an issue where io-wq takes seemingly forever to exit, and with a\nbit of debugging, this turns out to be because it queues a bunch of big\n(2GB - 4096b) reads with a /dev/msr* file. Since this file type doesn't\nsupport ->read_iter(), loop_rw_iter() ends up handling them. Each read\nreturns 16MB of data read, which takes 20 (!!) seconds. With a bunch of\nthese pending, processing the whole chain can take a long time. Easily\nlonger than the syzbot uninterruptible sleep timeout of 140 seconds.\nThis then triggers a complaint off the io-wq exit path:\n\nINFO: task syz.4.135:6326 blocked for more than 143 seconds.\n Not tainted syzkaller #0\n Blocked by coredump.\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:syz.4.135 state:D stack:26824 pid:6326 tgid:6324 ppid:5957 task_flags:0x400548 flags:0x00080000\nCall Trace:\n <TASK>\n context_switch kernel/sched/core.c:5256 [inline]\n __schedule+0x1139/0x6150 kernel/sched/core.c:6863\n __schedule_loop kernel/sched/core.c:6945 [inline]\n schedule+0xe7/0x3a0 kernel/sched/core.c:6960\n schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75\n do_wait_for_common kernel/sched/completion.c:100 [inline]\n __wait_for_common+0x2fc/0x4e0 kernel/sched/completion.c:121\n io_wq_exit_workers io_uring/io-wq.c:1328 [inline]\n io_wq_put_and_exit+0x271/0x8a0 io_uring/io-wq.c:1356\n io_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203\n io_uring_cancel_generic+0x69c/0x9a0 io_uring/cancel.c:651\n io_uring_files_cancel include/linux/io_uring.h:19 [inline]\n do_exit+0x2ce/0x2bd0 kernel/exit.c:911\n do_group_exit+0xd3/0x2a0 kernel/exit.c:1112\n get_signal+0x2671/0x26d0 kernel/signal.c:3034\n arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337\n __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]\n exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75\n __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]\n syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]\n syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]\n syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]\n do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fa02738f749\nRSP: 002b:00007fa0281ae0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca\nRAX: fffffffffffffe00 RBX: 00007fa0275e6098 RCX: 00007fa02738f749\nRDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa0275e6098\nRBP: 00007fa0275e6090 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fa0275e6128 R14: 00007fff14e4fcb0 R15: 00007fff14e4fd98\n\nThere's really nothing wrong here, outside of processing these reads\nwill take a LONG time. However, we can speed up the exit by checking the\nIO_WQ_BIT_EXIT inside the io_worker_handle_work() loop, as syzbot will\nexit the ring after queueing up all of these reads. Then once the first\nitem is processed, io-wq will simply cancel the rest. That should avoid\nsyzbot running into this complaint again."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nio_uring/io-wq: verificar IO_WQ_BIT_EXIT dentro del bucle de ejecuci\u00f3n de trabajo\n\nActualmente esto se verifica antes de ejecutar el trabajo pendiente. Normalmente esto est\u00e1 bastante bien, ya que los elementos de trabajo o terminan bloque\u00e1ndose (lo que crear\u00e1 un nuevo trabajador para otros elementos), o se completan bastante r\u00e1pido. Pero syzbot informa un problema donde io-wq tarda aparentemente una eternidad en salir, y con un poco de depuraci\u00f3n, esto resulta ser porque encola un mont\u00f3n de lecturas grandes (2GB - 4096b) con un archivo /dev/msr*. Dado que este tipo de archivo no soporta -&gt;read_iter(), loop_rw_iter() termina manej\u00e1ndolos. Cada lectura devuelve 16MB de datos le\u00eddos, lo que toma 20 (!!) segundos. Con un mont\u00f3n de estos pendientes, procesar toda la cadena puede tomar mucho tiempo. F\u00e1cilmente m\u00e1s largo que el tiempo de espera de suspensi\u00f3n ininterrumpible de syzbot de 140 segundos. Esto entonces desencadena una queja de la ruta de salida de io-wq:\n\nINFO: tarea syz.4.135:6326 bloqueada por m\u00e1s de 143 segundos.\n No contaminado syzkaller #0\n Bloqueado por coredump.\n'echo 0 &gt; /proc/sys/kernel/hung_task_timeout_secs' deshabilita este mensaje.\ntask:syz.4.135 estado:D stack:26824 pid:6326 tgid:6324 ppid:5957 task_flags:0x400548 flags:0x00080000\nTraza de Llamada:\n \n context_switch kernel/sched/core.c:5256 [en l\u00ednea]\n __schedule+0x1139/0x6150 kernel/sched/core.c:6863\n __schedule_loop kernel/sched/core.c:6945 [en l\u00ednea]\n schedule+0xe7/0x3a0 kernel/sched/core.c:6960\n schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75\n do_wait_for_common kernel/sched/completion.c:100 [en l\u00ednea]\n __wait_for_common+0x2fc/0x4e0 kernel/sched/completion.c:121\n io_wq_exit_workers io_uring/io-wq.c:1328 [en l\u00ednea]\n io_wq_put_and_exit+0x271/0x8a0 io_uring/io-wq.c:1356\n io_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203\n io_uring_cancel_generic+0x69c/0x9a0 io_uring/cancel.c:651\n io_uring_files_cancel include/linux/io_uring.h:19 [en l\u00ednea]\n do_exit+0x2ce/0x2bd0 kernel/exit.c:911\n do_group_exit+0xd3/0x2a0 kernel/exit.c:1112\n get_signal+0x2671/0x26d0 kernel/signal.c:3034\n arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337\n __exit_to_user_mode_loop kernel/entry/common.c:41 [en l\u00ednea]\n exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75\n __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [en l\u00ednea]\n syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [en l\u00ednea]\n syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [en l\u00ednea]\n syscall_exit_to_user_mode include/linux/entry-common.h:194 [en l\u00ednea]\n do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fa02738f749\nRSP: 002b:00007fa0281ae0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca\nRAX: fffffffffffffe00 RBX: 00007fa0275e6098 RCX: 00007fa02738f749\nRDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa0275e6098\nRBP: 00007fa0275e6090 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fa0275e6128 R14: 00007fff14e4fcb0 R15: 00007fff14e4fd98\n\nRealmente no hay nada malo aqu\u00ed, aparte de que procesar estas lecturas tomar\u00e1 MUCHO tiempo. Sin embargo, podemos acelerar la salida verificando el IO_WQ_BIT_EXIT dentro del bucle io_worker_handle_work(), ya que syzbot saldr\u00e1 del anillo despu\u00e9s de encolar todas estas lecturas. Luego, una vez que se procesa el primer elemento, io-wq simplemente cancelar\u00e1 el resto. Eso deber\u00eda evitar que syzbot se encuentre con esta queja de nuevo."}], "id": "CVE-2026-23113", "lastModified": "2026-11-10T13:18:36.020", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23113", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:19:36.113336Z", "version": "2.0.3"}}]}, "published": "2026-02-14T15:16:06.380", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/10dc959398175736e495f71c771f8641e1ca1907"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/27e47500fac23d15b7dc93ff650bc4844d2581bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2e8ca1078b14142db2ce51cbd18ff9971560046b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/85eb83694a91c89d9abe615d717c0053c3efa714"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bdf0bf73006ea8af9327cdb85cfdff4c23a5f966"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d05d99573f81a091547b1778b9a50120f5d6c68a"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: io_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop", "id": "2439867", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2439867"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nio_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop\nCurrently this is checked before running the pending work. Normally this\nis quite fine, as work items either end up blocking (which will create a\nnew worker for other items), or they complete fairly quickly. But syzbot\nreports an issue where io-wq takes seemingly forever to exit, and with a\nbit of debugging, this turns out to be because it queues a bunch of big\n(2GB - 4096b) reads with a /dev/msr* file. Since this file type doesn't\nsupport ->read_iter(), loop_rw_iter() ends up handling them. Each read\nreturns 16MB of data read, which takes 20 (!!) seconds. With a bunch of\nthese pending, processing the whole chain can take a long time. Easily\nlonger than the syzbot uninterruptible sleep timeout of 140 seconds.\nThis then triggers a complaint off the io-wq exit path:\nINFO: task syz.4.135:6326 blocked for more than 143 seconds.\nNot tainted syzkaller #0\nBlocked by coredump.\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:syz.4.135 state:D stack:26824 pid:6326 tgid:6324 ppid:5957 task_flags:0x400548 flags:0x00080000\nCall Trace:\n<TASK>\ncontext_switch kernel/sched/core.c:5256 [inline]\n__schedule+0x1139/0x6150 kernel/sched/core.c:6863\n__schedule_loop kernel/sched/core.c:6945 [inline]\nschedule+0xe7/0x3a0 kernel/sched/core.c:6960\nschedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75\ndo_wait_for_common kernel/sched/completion.c:100 [inline]\n__wait_for_common+0x2fc/0x4e0 kernel/sched/completion.c:121\nio_wq_exit_workers io_uring/io-wq.c:1328 [inline]\nio_wq_put_and_exit+0x271/0x8a0 io_uring/io-wq.c:1356\nio_uring_clean_tctx+0x10d/0x190 io_uring/tctx.c:203\nio_uring_cancel_generic+0x69c/0x9a0 io_uring/cancel.c:651\nio_uring_files_cancel include/linux/io_uring.h:19 [inline]\ndo_exit+0x2ce/0x2bd0 kernel/exit.c:911\ndo_group_exit+0xd3/0x2a0 kernel/exit.c:1112\nget_signal+0x2671/0x26d0 kernel/signal.c:3034\narch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337\n__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]\nexit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75\n__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]\nsyscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]\nsyscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]\nsyscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]\ndo_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fa02738f749\nRSP: 002b:00007fa0281ae0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca\nRAX: fffffffffffffe00 RBX: 00007fa0275e6098 RCX: 00007fa02738f749\nRDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa0275e6098\nRBP: 00007fa0275e6090 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fa0275e6128 R14: 00007fff14e4fcb0 R15: 00007fff14e4fd98\nThere's really nothing wrong here, outside of processing these reads\nwill take a LONG time. However, we can speed up the exit by checking the\nIO_WQ_BIT_EXIT inside the io_worker_handle_work() loop, as syzbot will\nexit the ring after queueing up all of these reads. Then once the first\nitem is processed, io-wq will simply cancel the rest. That should avoid\nsyzbot running into this complaint again."], "name": "CVE-2026-23113", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23113\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23113\nhttps://lore.kernel.org/linux-cve-announce/2026021405-CVE-2026-23113-a027@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,85eb83694a91c89d9abe615d717c0053c3efa714)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,2e8ca1078b14142db2ce51cbd18ff9971560046b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,bdf0bf73006ea8af9327cdb85cfdff4c23a5f966)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,10dc959398175736e495f71c771f8641e1ca1907)"}}], "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.122,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.68,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.8,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19,*]"}}], "product": "linux_kernel", "vendor": "linux"}], "analysis": {"en": {"generated_at": "2026-04-18T12:28:45.883124+00:00", "value": {"mitigation_remediation": ["Upgrade to a kernel version that includes the patch that checks IO_WQ_BIT_EXIT inside the work run loop", "If a kernel upgrade is not immediately possible, reduce /proc/sys/kernel/hung_task_timeout_secs to a lower value to shorten the time before the kernel reports a hung task, thereby limiting the impact window", "Limit or deny large io_uring read operations against /dev/msr* devices by applying stricter access controls or disabling the use of /dev/msr* through device\u2011node permissions"], "summary": {"action": "Apply Patch", "impact": "Denial of Service via kernel task hang"}, "threat_synthesis": {"affected_systems": "All Linux kernel releases prior to the patch that include the io_uring infrastructure are affected, notably kernel 5.12 and the 6.19 series, including all release candidates. Any system that runs these kernels and exposes the io_uring interface is susceptible.", "description_and_impact": "Large io_uring read operations on the /dev/msr* device cause io_wq workers to spend an excessive amount of time processing data. The kernel then reports a hung task after approximately 140 seconds, which can stall process shutdown and potentially impact system responsiveness. The flaw does not provide arbitrary code execution but can exhaust kernel resources and generate availability issues. This is the primary impact of the vulnerability.", "risk_and_exploitability": "The CVSS score of 5.5 reflects a moderate risk, while the EPSS score of less than 1% indicates that exploitation is unlikely but possible. The vulnerability is not listed in the CISA KEV catalog. Based on the description, it is inferred that an attacker could trigger the condition by sending large io_uring read requests to /dev/msr* devices, which requires the target to have the privilege to issue such requests. The exploitation route would therefore involve privileged or compromised processes rather than remote unauthenticated access."}}}}, "created": "2026-02-16T12:01:50.746753+00:00", "updated": "2026-04-18T12:30:45.480179+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-400"]}