CVE-2026-80589

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80589", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.770Z", "datePublished": "2026-08-26T14:37:43.293Z", "dateUpdated": "2026-10-16T19:26:29.099Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-27T05:02:10.391Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: stop the timeout timer when releasing a never added disk\n\ndisk_release() undoes blk_mq_init_allocated_queue() for a disk whose\nprobe failed before add_disk(), but it only calls blk_mq_exit_queue().\nNothing there stops q->timeout, and that timer rolls forward: it stays\npending until it next expires, not until the last request completes.\nSo if the driver issued any I/O before adding the disk, the\nrequest_queue is freed while still linked into a timer wheel bucket.\n\nCommit 6f8191fdf41d (\"block: simplify disk shutdown\") dropped the\nblk_cleanup_queue() call that used to stop it. __del_gendisk() and\nblk_mq_destroy_queue() still do; only the probe failure path lost it.\n\nnvme gets there because nvme_update_ns_info() submits Report Zones or\nFDP io-mgmt-recv on ns->queue before the disk is added, so a later\nfailure - a concurrent reset setting NVME_CTRL_FROZEN, or\ndevice_add_disk() failing - lands in put_disk() with the timer armed:\n\n BUG: KASAN: slab-use-after-free in detach_if_pending+0x30c/0x340\n Write of size 8 at addr ffff888004d71310 by task kworker/u8:2/37\n __timer_delete_sync+0x156/0x240 kernel/time/timer.c:1621\n blk_sync_queue+0x22/0x40 block/blk-core.c:222\n nvme_sync_queues+0x100/0x150 drivers/nvme/host/core.c:5362\n nvme_reset_work+0x138/0x930 drivers/nvme/host/pci.c:3264\n\n Allocated by task 34:\n __blk_mq_alloc_disk+0x33/0x100 block/blk-mq.c:4462\n nvme_alloc_ns+0x290/0x3870 drivers/nvme/host/core.c:4146\n\n Freed by task 0:\n blk_free_queue_rcu+0x3a/0x50 block/blk-core.c:254\n rcu_core+0xc10/0x1730 kernel/rcu/tree.c:2857\n\nThe queue being synced there is ctrl->admin_q, only a victim sharing a\ntimer wheel bucket with the freed queue's dangling entry; other runs\ntripped in enqueue_timer(), __run_timers() or blk_mq_timeout_work().\nFailing nvme_alloc_ns() with a debug patch makes it deterministic: one\nleaked timer trips KASAN within seconds, while 1987 patched releases\nproduced no splat.\n\nStop the timer and the queue work items before blk_mq_exit_queue(), like\nblk_mq_destroy_queue() does.\n\nFound by FuzzNvme."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - Exploitation reaches disk_release() via NVMe namespace probing that issues pre-add_disk I/O (FDP io-mgmt-recv, Report Zones) over NVMe-oF TCP/RDMA; a remote or storage-network peer can supply crafted responses during automatic scan/reconnect on cloud/datacenter initiators.\nAC:L - An attacker controlling the NVMe endpoint can reliably time namespace enumeration I/O (arming q->timeout) with a concurrent probe failure (controller reset/NVME_CTRL_FROZEN or device_add_disk failure); FuzzNvme made this deterministic, and the attacker controls both sides of the race.\nPR:N - No local account or capability is required on the victim host at exploitation time; once an NVMe fabric path exists, a remote/compromised target or storage-network attacker can trigger the probe-failure teardown without CAP_SYS_ADMIN, ioctl, or sysfs access.\nUI:N - The bug fires during automatic kernel namespace scan/reconnect and queue teardown on probe failure; no victim mount, login, or manual device interaction is required beyond normal background storage enumeration.\nS:U - Impact is kernel slab corruption and crashes within the host kernel block layer; it does not cross a VM, container, or IOMMU security boundary even though virtio_blk shares the same pre-add_disk probe pattern.\nC:H - KASAN reports slab use-after-free with an 8-byte write in detach_if_pending on a freed request_queue whose timeout timer remains on the timer wheel; UAF of queue/timer structures enables arbitrary kernel memory disclosure primitives.\nI:H - The dangling timer wheel entry corrupts kernel heap metadata and can affect unrelated queues (e.g., ctrl->admin_q in the reported stack); UAF on request_queue/timer state is exploitable for arbitrary write and control-flow hijacking, not merely a crash.\nA:H - Observed impact includes KASAN BUG/oops from timer deletion and queue sync on freed memory; leaked timers also trip in enqueue_timer(), __run_timers(), and blk_mq_timeout_work(), causing kernel panics and denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/genhd.c"], "versions": [{"version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "6ae7364f68e6c7af6b6df4bbb14040b89e5975d0", "status": "affected", "versionType": "git"}, {"version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "6f06dbe5012c160e0dba418a5a9cb16c456ad46a", "status": "affected", "versionType": "git"}, {"version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "1a0ae4d502062a2759f2a92d12bdeab3c64c7372", "status": "affected", "versionType": "git"}, {"version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "bb03b56d1d754908a37a160603be21769da423cf", "status": "affected", "versionType": "git"}, {"version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "93d620519d71dfc6ee64b5baea74f1d85d4439fb", "status": "affected", "versionType": "git"}, {"version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "26cb8ebbfaf713c82e142d08828d4d765057633b", "status": "affected", "versionType": "git"}, {"version": "d27b66257db183fe11c10f31246ae965adb005d3", "status": "affected", "versionType": "git"}, {"version": "5.19.12", "lessThan": "5.20", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/genhd.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.184", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.153", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.105", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.46", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.10", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.0", "versionEndExcluding": "6.1.184"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.153"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.105"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6ae7364f68e6c7af6b6df4bbb14040b89e5975d0"}, {"url": "https://git.kernel.org/stable/c/6f06dbe5012c160e0dba418a5a9cb16c456ad46a"}, {"url": "https://git.kernel.org/stable/c/1a0ae4d502062a2759f2a92d12bdeab3c64c7372"}, {"url": "https://git.kernel.org/stable/c/bb03b56d1d754908a37a160603be21769da423cf"}, {"url": "https://git.kernel.org/stable/c/93d620519d71dfc6ee64b5baea74f1d85d4439fb"}, {"url": "https://git.kernel.org/stable/c/26cb8ebbfaf713c82e142d08828d4d765057633b"}], "title": "block: stop the timeout timer when releasing a never added disk", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-80589", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:18:09.871712Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:29.099Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-80589", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:18:09.871712Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:18:10.803Z"}}], "cna": {"title": "block: stop the timeout timer when releasing a never added disk", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - Exploitation reaches disk_release() via NVMe namespace probing that issues pre-add_disk I/O (FDP io-mgmt-recv, Report Zones) over NVMe-oF TCP/RDMA; a remote or storage-network peer can supply crafted responses during automatic scan/reconnect on cloud/datacenter initiators.\nAC:L - An attacker controlling the NVMe endpoint can reliably time namespace enumeration I/O (arming q->timeout) with a concurrent probe failure (controller reset/NVME_CTRL_FROZEN or device_add_disk failure); FuzzNvme made this deterministic, and the attacker controls both sides of the race.\nPR:N - No local account or capability is required on the victim host at exploitation time; once an NVMe fabric path exists, a remote/compromised target or storage-network attacker can trigger the probe-failure teardown without CAP_SYS_ADMIN, ioctl, or sysfs access.\nUI:N - The bug fires during automatic kernel namespace scan/reconnect and queue teardown on probe failure; no victim mount, login, or manual device interaction is required beyond normal background storage enumeration.\nS:U - Impact is kernel slab corruption and crashes within the host kernel block layer; it does not cross a VM, container, or IOMMU security boundary even though virtio_blk shares the same pre-add_disk probe pattern.\nC:H - KASAN reports slab use-after-free with an 8-byte write in detach_if_pending on a freed request_queue whose timeout timer remains on the timer wheel; UAF of queue/timer structures enables arbitrary kernel memory disclosure primitives.\nI:H - The dangling timer wheel entry corrupts kernel heap metadata and can affect unrelated queues (e.g., ctrl->admin_q in the reported stack); UAF on request_queue/timer state is exploitable for arbitrary write and control-flow hijacking, not merely a crash.\nA:H - Observed impact includes KASAN BUG/oops from timer deletion and queue sync on freed memory; leaked timers also trip in enqueue_timer(), __run_timers(), and blk_mq_timeout_work(), causing kernel panics and denial of service."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "6ae7364f68e6c7af6b6df4bbb14040b89e5975d0", "versionType": "git"}, {"status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "6f06dbe5012c160e0dba418a5a9cb16c456ad46a", "versionType": "git"}, {"status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "1a0ae4d502062a2759f2a92d12bdeab3c64c7372", "versionType": "git"}, {"status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "bb03b56d1d754908a37a160603be21769da423cf", "versionType": "git"}, {"status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "93d620519d71dfc6ee64b5baea74f1d85d4439fb", "versionType": "git"}, {"status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "26cb8ebbfaf713c82e142d08828d4d765057633b", "versionType": "git"}, {"status": "affected", "version": "d27b66257db183fe11c10f31246ae965adb005d3", "versionType": "git"}, {"status": "affected", "version": "5.19.12", "lessThan": "5.20", "versionType": "semver"}], "programFiles": ["block/genhd.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"status": "unaffected", "version": "0", "lessThan": "6.0", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.184", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.153", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.105", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.46", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.10", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["block/genhd.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/6ae7364f68e6c7af6b6df4bbb14040b89e5975d0"}, {"url": "https://git.kernel.org/stable/c/6f06dbe5012c160e0dba418a5a9cb16c456ad46a"}, {"url": "https://git.kernel.org/stable/c/1a0ae4d502062a2759f2a92d12bdeab3c64c7372"}, {"url": "https://git.kernel.org/stable/c/bb03b56d1d754908a37a160603be21769da423cf"}, {"url": "https://git.kernel.org/stable/c/93d620519d71dfc6ee64b5baea74f1d85d4439fb"}, {"url": "https://git.kernel.org/stable/c/26cb8ebbfaf713c82e142d08828d4d765057633b"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: stop the timeout timer when releasing a never added disk\n\ndisk_release() undoes blk_mq_init_allocated_queue() for a disk whose\nprobe failed before add_disk(), but it only calls blk_mq_exit_queue().\nNothing there stops q->timeout, and that timer rolls forward: it stays\npending until it next expires, not until the last request completes.\nSo if the driver issued any I/O before adding the disk, the\nrequest_queue is freed while still linked into a timer wheel bucket.\n\nCommit 6f8191fdf41d (\"block: simplify disk shutdown\") dropped the\nblk_cleanup_queue() call that used to stop it. __del_gendisk() and\nblk_mq_destroy_queue() still do; only the probe failure path lost it.\n\nnvme gets there because nvme_update_ns_info() submits Report Zones or\nFDP io-mgmt-recv on ns->queue before the disk is added, so a later\nfailure - a concurrent reset setting NVME_CTRL_FROZEN, or\ndevice_add_disk() failing - lands in put_disk() with the timer armed:\n\n BUG: KASAN: slab-use-after-free in detach_if_pending+0x30c/0x340\n Write of size 8 at addr ffff888004d71310 by task kworker/u8:2/37\n __timer_delete_sync+0x156/0x240 kernel/time/timer.c:1621\n blk_sync_queue+0x22/0x40 block/blk-core.c:222\n nvme_sync_queues+0x100/0x150 drivers/nvme/host/core.c:5362\n nvme_reset_work+0x138/0x930 drivers/nvme/host/pci.c:3264\n\n Allocated by task 34:\n __blk_mq_alloc_disk+0x33/0x100 block/blk-mq.c:4462\n nvme_alloc_ns+0x290/0x3870 drivers/nvme/host/core.c:4146\n\n Freed by task 0:\n blk_free_queue_rcu+0x3a/0x50 block/blk-core.c:254\n rcu_core+0xc10/0x1730 kernel/rcu/tree.c:2857\n\nThe queue being synced there is ctrl->admin_q, only a victim sharing a\ntimer wheel bucket with the freed queue's dangling entry; other runs\ntripped in enqueue_timer(), __run_timers() or blk_mq_timeout_work().\nFailing nvme_alloc_ns() with a debug patch makes it deterministic: one\nleaked timer trips KASAN within seconds, while 1987 patched releases\nproduced no splat.\n\nStop the timer and the queue work items before blk_mq_exit_queue(), like\nblk_mq_destroy_queue() does.\n\nFound by FuzzNvme."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.184", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.153", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.105", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.46", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.10", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.19.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-27T05:02:10.391Z"}}}, "cveMetadata": {"cveId": "CVE-2026-80589", "state": "PUBLISHED", "dateUpdated": "2026-10-16T19:26:29.099Z", "dateReserved": "2026-08-26T14:34:25.770Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-26T14:37:43.293Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["block/genhd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6ae7364f68e6c7af6b6df4bbb14040b89e5975d0", "status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "versionType": "git"}, {"lessThan": "6f06dbe5012c160e0dba418a5a9cb16c456ad46a", "status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "versionType": "git"}, {"lessThan": "1a0ae4d502062a2759f2a92d12bdeab3c64c7372", "status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "versionType": "git"}, {"lessThan": "bb03b56d1d754908a37a160603be21769da423cf", "status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "versionType": "git"}, {"lessThan": "93d620519d71dfc6ee64b5baea74f1d85d4439fb", "status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "versionType": "git"}, {"lessThan": "26cb8ebbfaf713c82e142d08828d4d765057633b", "status": "affected", "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "versionType": "git"}, {"status": "affected", "version": "d27b66257db183fe11c10f31246ae965adb005d3", "versionType": "git"}, {"lessThan": "5.20", "status": "affected", "version": "5.19.12", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["block/genhd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.184", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.153", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.105", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.46", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: stop the timeout timer when releasing a never added disk\n\ndisk_release() undoes blk_mq_init_allocated_queue() for a disk whose\nprobe failed before add_disk(), but it only calls blk_mq_exit_queue().\nNothing there stops q->timeout, and that timer rolls forward: it stays\npending until it next expires, not until the last request completes.\nSo if the driver issued any I/O before adding the disk, the\nrequest_queue is freed while still linked into a timer wheel bucket.\n\nCommit 6f8191fdf41d (\"block: simplify disk shutdown\") dropped the\nblk_cleanup_queue() call that used to stop it. __del_gendisk() and\nblk_mq_destroy_queue() still do; only the probe failure path lost it.\n\nnvme gets there because nvme_update_ns_info() submits Report Zones or\nFDP io-mgmt-recv on ns->queue before the disk is added, so a later\nfailure - a concurrent reset setting NVME_CTRL_FROZEN, or\ndevice_add_disk() failing - lands in put_disk() with the timer armed:\n\n BUG: KASAN: slab-use-after-free in detach_if_pending+0x30c/0x340\n Write of size 8 at addr ffff888004d71310 by task kworker/u8:2/37\n __timer_delete_sync+0x156/0x240 kernel/time/timer.c:1621\n blk_sync_queue+0x22/0x40 block/blk-core.c:222\n nvme_sync_queues+0x100/0x150 drivers/nvme/host/core.c:5362\n nvme_reset_work+0x138/0x930 drivers/nvme/host/pci.c:3264\n\n Allocated by task 34:\n __blk_mq_alloc_disk+0x33/0x100 block/blk-mq.c:4462\n nvme_alloc_ns+0x290/0x3870 drivers/nvme/host/core.c:4146\n\n Freed by task 0:\n blk_free_queue_rcu+0x3a/0x50 block/blk-core.c:254\n rcu_core+0xc10/0x1730 kernel/rcu/tree.c:2857\n\nThe queue being synced there is ctrl->admin_q, only a victim sharing a\ntimer wheel bucket with the freed queue's dangling entry; other runs\ntripped in enqueue_timer(), __run_timers() or blk_mq_timeout_work().\nFailing nvme_alloc_ns() with a debug patch makes it deterministic: one\nleaked timer trips KASAN within seconds, while 1987 patched releases\nproduced no splat.\n\nStop the timer and the queue work items before blk_mq_exit_queue(), like\nblk_mq_destroy_queue() does.\n\nFound by FuzzNvme."}], "id": "CVE-2026-80589", "lastModified": "2026-10-16T20:18:02.217", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-80589", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T19:18:09.871712Z", "version": "2.0.3"}}]}, "published": "2026-08-26T15:17:15.283", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1a0ae4d502062a2759f2a92d12bdeab3c64c7372"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/26cb8ebbfaf713c82e142d08828d4d765057633b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ae7364f68e6c7af6b6df4bbb14040b89e5975d0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6f06dbe5012c160e0dba418a5a9cb16c456ad46a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93d620519d71dfc6ee64b5baea74f1d85d4439fb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bb03b56d1d754908a37a160603be21769da423cf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: block: stop the timeout timer when releasing a never added disk", "id": "2524496", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524496"}, "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"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nblock: stop the timeout timer when releasing a never added disk\ndisk_release() undoes blk_mq_init_allocated_queue() for a disk whose\nprobe failed before add_disk(), but it only calls blk_mq_exit_queue().\nNothing there stops q->timeout, and that timer rolls forward: it stays\npending until it next expires, not until the last request completes.\nSo if the driver issued any I/O before adding the disk, the\nrequest_queue is freed while still linked into a timer wheel bucket.\nCommit 6f8191fdf41d (\"block: simplify disk shutdown\") dropped the\nblk_cleanup_queue() call that used to stop it. __del_gendisk() and\nblk_mq_destroy_queue() still do; only the probe failure path lost it.\nnvme gets there because nvme_update_ns_info() submits Report Zones or\nFDP io-mgmt-recv on ns->queue before the disk is added, so a later\nfailure - a concurrent reset setting NVME_CTRL_FROZEN, or\ndevice_add_disk() failing - lands in put_disk() with the timer armed:\nBUG: KASAN: slab-use-after-free in detach_if_pending+0x30c/0x340\nWrite of size 8 at addr ffff888004d71310 by task kworker/u8:2/37\n__timer_delete_sync+0x156/0x240 kernel/time/timer.c:1621\nblk_sync_queue+0x22/0x40 block/blk-core.c:222\nnvme_sync_queues+0x100/0x150 drivers/nvme/host/core.c:5362\nnvme_reset_work+0x138/0x930 drivers/nvme/host/pci.c:3264\nAllocated by task 34:\n__blk_mq_alloc_disk+0x33/0x100 block/blk-mq.c:4462\nnvme_alloc_ns+0x290/0x3870 drivers/nvme/host/core.c:4146\nFreed by task 0:\nblk_free_queue_rcu+0x3a/0x50 block/blk-core.c:254\nrcu_core+0xc10/0x1730 kernel/rcu/tree.c:2857\nThe queue being synced there is ctrl->admin_q, only a victim sharing a\ntimer wheel bucket with the freed queue's dangling entry; other runs\ntripped in enqueue_timer(), __run_timers() or blk_mq_timeout_work().\nFailing nvme_alloc_ns() with a debug patch makes it deterministic: one\nleaked timer trips KASAN within seconds, while 1987 patched releases\nproduced no splat.\nStop the timer and the queue work items before blk_mq_exit_queue(), like\nblk_mq_destroy_queue() does.\nFound by FuzzNvme.", "A flaw was found in the Linux kernel's block subsystem. This vulnerability occurs when a disk's initialization fails before it is fully integrated, causing a critical timer to remain active even after the associated memory is released. This improper handling of memory can lead to a use-after-free condition, potentially allowing a local attacker to trigger a system crash and cause a denial of service."], "name": "CVE-2026-80589", "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": "2026-08-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80589\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80589\nhttps://lore.kernel.org/linux-cve-announce/2026082617-CVE-2026-80589-81b6@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6f8191fdf41d3a53cc1d63fe2234e812c55a0092,6ae7364f68e6c7af6b6df4bbb14040b89e5975d0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6f8191fdf41d3a53cc1d63fe2234e812c55a0092,6f06dbe5012c160e0dba418a5a9cb16c456ad46a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6f8191fdf41d3a53cc1d63fe2234e812c55a0092,1a0ae4d502062a2759f2a92d12bdeab3c64c7372)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6f8191fdf41d3a53cc1d63fe2234e812c55a0092,bb03b56d1d754908a37a160603be21769da423cf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6f8191fdf41d3a53cc1d63fe2234e812c55a0092,93d620519d71dfc6ee64b5baea74f1d85d4439fb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6f8191fdf41d3a53cc1d63fe2234e812c55a0092,26cb8ebbfaf713c82e142d08828d4d765057633b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "d27b66257db183fe11c10f31246ae965adb005d3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.19.12,5.20)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.184,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.153,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.105,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.46,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.10,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2, *]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-26T17:00:04.693866+00:00", "updated": "2026-08-28T19:30:16.872124+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}