CVE-2023-52903

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-52903", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-08-21T06:07:11.014Z", "datePublished": "2024-08-21T06:10:43.857Z", "dateUpdated": "2026-08-05T09:11:53.830Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:11:53.830Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: lock overflowing for IOPOLL\n\nsyzbot reports an issue with overflow filling for IOPOLL:\n\nWARNING: CPU: 0 PID: 28 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\nCPU: 0 PID: 28 Comm: kworker/u4:1 Not tainted 6.2.0-rc3-syzkaller-16369-g358a161a6a9e #0\nWorkqueue: events_unbound io_ring_exit_work\nCall trace:\n\u00a0io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\n\u00a0io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773\n\u00a0io_fill_cqe_req io_uring/io_uring.h:168 [inline]\n\u00a0io_do_iopoll+0x474/0x62c io_uring/rw.c:1065\n\u00a0io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513\n\u00a0io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056\n\u00a0io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869\n\u00a0process_one_work+0x2d8/0x504 kernel/workqueue.c:2289\n\u00a0worker_thread+0x340/0x610 kernel/workqueue.c:2436\n\u00a0kthread+0x12c/0x158 kernel/kthread.c:376\n\u00a0ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863\n\nThere is no real problem for normal IOPOLL as flush is also called with\nuring_lock taken, but it's getting more complicated for IOPOLL|SQPOLL,\nfor which __io_cqring_overflow_flush() happens from the CQ waiting path."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is in io_uring IOPOLL completion overflow (`io_do_iopoll` \u2192 `io_fill_cqe_req` \u2192 `io_req_cqe_overflow`), reachable only via local `io_uring_setup`/`io_uring_enter` on an attacker-owned ring, not via network packet processing.\nAC:L - An attacker can force CQ overflow on an IOPOLL ring while concurrently posting aux CQEs (e.g. `IORING_MSG_DATA` via msg_ring\u2019s `io_post_aux_cqe`, which took only `completion_lock`) so both sides of the `cq_overflow_list` race are attacker-controlled.\nPR:L - io_uring is usable by unprivileged local users by default (`kernel.io_uring_disabled=0`); IOPOLL and msg_ring require no CAP_SYS_ADMIN or init-namespace root.\nUI:N - The attacker creates the ring(s), submits IOPOLL work, overflows the CQ, and drives concurrent overflow/aux posting themselves; no victim action is required.\nS:U - Impact is kernel memory corruption within the host OS authority (local privilege escalation); no VM escape, IOMMU bypass, or sandbox boundary is crossed.\nC:H - Missing `completion_lock` while mutating `cq_overflow_list` races with other overflow/aux posters holding that lock, enabling linked-list corruption and use-after-free of overflow entries that can be leveraged for arbitrary kernel memory disclosure.\nI:H - Concurrent unlocked list add/delete/kfree on `cq_overflow_list` yields classic heap UAF/double-free primitives exploitable for arbitrary write and control-flow hijacking.\nA:H - The same race can oops/panic the kernel via list corruption, and the observed lockdep path is a `WARN` in `io_cqring_event_overflow` (High under panic_on_warn / oops deployments)."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/rw.c"], "versions": [{"version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "lessThan": "de77faee280163ff03b7ab64af6c9d779a43d4c4", "status": "affected", "versionType": "git"}, {"version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "lessThan": "ed4629d1e968359fbb91d0a3780b1e86a2c08845", "status": "affected", "versionType": "git"}, {"version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "lessThan": "7fc3990dad04a677606337ebc61964094d6cb41b", "status": "affected", "versionType": "git"}, {"version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "lessThan": "544d163d659d45a206d8929370d5a2984e546cb7", "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/rw.c"], "versions": [{"version": "5.1", "status": "affected"}, {"version": "0", "lessThan": "5.1", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.165", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.89", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.7", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "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": "5.1", "versionEndExcluding": "5.10.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "5.15.89"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.1.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/de77faee280163ff03b7ab64af6c9d779a43d4c4"}, {"url": "https://git.kernel.org/stable/c/ed4629d1e968359fbb91d0a3780b1e86a2c08845"}, {"url": "https://git.kernel.org/stable/c/7fc3990dad04a677606337ebc61964094d6cb41b"}, {"url": "https://git.kernel.org/stable/c/544d163d659d45a206d8929370d5a2984e546cb7"}], "title": "io_uring: lock overflowing for IOPOLL", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-52903", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:03:21.069603Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:14.061Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-52903", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:03:21.069603Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:18.566Z"}}], "cna": {"title": "io_uring: lock overflowing for IOPOLL", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is in io_uring IOPOLL completion overflow (`io_do_iopoll` \u2192 `io_fill_cqe_req` \u2192 `io_req_cqe_overflow`), reachable only via local `io_uring_setup`/`io_uring_enter` on an attacker-owned ring, not via network packet processing.\nAC:L - An attacker can force CQ overflow on an IOPOLL ring while concurrently posting aux CQEs (e.g. `IORING_MSG_DATA` via msg_ring\u2019s `io_post_aux_cqe`, which took only `completion_lock`) so both sides of the `cq_overflow_list` race are attacker-controlled.\nPR:L - io_uring is usable by unprivileged local users by default (`kernel.io_uring_disabled=0`); IOPOLL and msg_ring require no CAP_SYS_ADMIN or init-namespace root.\nUI:N - The attacker creates the ring(s), submits IOPOLL work, overflows the CQ, and drives concurrent overflow/aux posting themselves; no victim action is required.\nS:U - Impact is kernel memory corruption within the host OS authority (local privilege escalation); no VM escape, IOMMU bypass, or sandbox boundary is crossed.\nC:H - Missing `completion_lock` while mutating `cq_overflow_list` races with other overflow/aux posters holding that lock, enabling linked-list corruption and use-after-free of overflow entries that can be leveraged for arbitrary kernel memory disclosure.\nI:H - Concurrent unlocked list add/delete/kfree on `cq_overflow_list` yields classic heap UAF/double-free primitives exploitable for arbitrary write and control-flow hijacking.\nA:H - The same race can oops/panic the kernel via list corruption, and the observed lockdep path is a `WARN` in `io_cqring_event_overflow` (High under panic_on_warn / oops deployments)."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "lessThan": "de77faee280163ff03b7ab64af6c9d779a43d4c4", "versionType": "git"}, {"status": "affected", "version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "lessThan": "ed4629d1e968359fbb91d0a3780b1e86a2c08845", "versionType": "git"}, {"status": "affected", "version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "lessThan": "7fc3990dad04a677606337ebc61964094d6cb41b", "versionType": "git"}, {"status": "affected", "version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "lessThan": "544d163d659d45a206d8929370d5a2984e546cb7", "versionType": "git"}], "programFiles": ["io_uring/rw.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.1"}, {"status": "unaffected", "version": "0", "lessThan": "5.1", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.165", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.89", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.7", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["io_uring/rw.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/de77faee280163ff03b7ab64af6c9d779a43d4c4"}, {"url": "https://git.kernel.org/stable/c/ed4629d1e968359fbb91d0a3780b1e86a2c08845"}, {"url": "https://git.kernel.org/stable/c/7fc3990dad04a677606337ebc61964094d6cb41b"}, {"url": "https://git.kernel.org/stable/c/544d163d659d45a206d8929370d5a2984e546cb7"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: lock overflowing for IOPOLL\n\nsyzbot reports an issue with overflow filling for IOPOLL:\n\nWARNING: CPU: 0 PID: 28 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\nCPU: 0 PID: 28 Comm: kworker/u4:1 Not tainted 6.2.0-rc3-syzkaller-16369-g358a161a6a9e #0\nWorkqueue: events_unbound io_ring_exit_work\nCall trace:\n\u00a0io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\n\u00a0io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773\n\u00a0io_fill_cqe_req io_uring/io_uring.h:168 [inline]\n\u00a0io_do_iopoll+0x474/0x62c io_uring/rw.c:1065\n\u00a0io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513\n\u00a0io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056\n\u00a0io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869\n\u00a0process_one_work+0x2d8/0x504 kernel/workqueue.c:2289\n\u00a0worker_thread+0x340/0x610 kernel/workqueue.c:2436\n\u00a0kthread+0x12c/0x158 kernel/kthread.c:376\n\u00a0ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863\n\nThere is no real problem for normal IOPOLL as flush is also called with\nuring_lock taken, but it's getting more complicated for IOPOLL|SQPOLL,\nfor which __io_cqring_overflow_flush() happens from the CQ waiting path."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.165", "versionStartIncluding": "5.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.89", "versionStartIncluding": "5.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.7", "versionStartIncluding": "5.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.2", "versionStartIncluding": "5.1"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:11:53.830Z"}}}, "cveMetadata": {"cveId": "CVE-2023-52903", "state": "PUBLISHED", "dateUpdated": "2026-08-05T09:11:53.830Z", "dateReserved": "2024-08-21T06:07:11.014Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-08-21T06:10:43.857Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["io_uring/rw.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "de77faee280163ff03b7ab64af6c9d779a43d4c4", "status": "affected", "version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "versionType": "git"}, {"lessThan": "ed4629d1e968359fbb91d0a3780b1e86a2c08845", "status": "affected", "version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "versionType": "git"}, {"lessThan": "7fc3990dad04a677606337ebc61964094d6cb41b", "status": "affected", "version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "versionType": "git"}, {"lessThan": "544d163d659d45a206d8929370d5a2984e546cb7", "status": "affected", "version": "2b188cc1bb857a9d4701ae59aa7768b5124e262e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["io_uring/rw.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.1"}, {"lessThan": "5.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.165", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.89", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "90BB6D42-B4A2-4088-8C86-2F91DFA6B7B6", "versionEndIncluding": "5.10.165", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E706841F-E788-4316-9B05-DA8EB60CE6B3", "versionEndExcluding": "5.15.89", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9275C81F-AE96-4CDB-AD20-7DBD36E5D909", "versionEndExcluding": "6.1.7", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*", "matchCriteriaId": "FF501633-2F44-4913-A8EE-B021929F49F6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*", "matchCriteriaId": "2BDA597B-CAC1-4DF0-86F0-42E142C654E9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*", "matchCriteriaId": "725C78C9-12CE-406F-ABE8-0813A01D66E8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: lock overflowing for IOPOLL\n\nsyzbot reports an issue with overflow filling for IOPOLL:\n\nWARNING: CPU: 0 PID: 28 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\nCPU: 0 PID: 28 Comm: kworker/u4:1 Not tainted 6.2.0-rc3-syzkaller-16369-g358a161a6a9e #0\nWorkqueue: events_unbound io_ring_exit_work\nCall trace:\n\u00a0io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\n\u00a0io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773\n\u00a0io_fill_cqe_req io_uring/io_uring.h:168 [inline]\n\u00a0io_do_iopoll+0x474/0x62c io_uring/rw.c:1065\n\u00a0io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513\n\u00a0io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056\n\u00a0io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869\n\u00a0process_one_work+0x2d8/0x504 kernel/workqueue.c:2289\n\u00a0worker_thread+0x340/0x610 kernel/workqueue.c:2436\n\u00a0kthread+0x12c/0x158 kernel/kthread.c:376\n\u00a0ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863\n\nThere is no real problem for normal IOPOLL as flush is also called with\nuring_lock taken, but it's getting more complicated for IOPOLL|SQPOLL,\nfor which __io_cqring_overflow_flush() happens from the CQ waiting path."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring: bloqueo desbordado para IOPOLL syzbot informa un problema con el desbordamiento de llenado para IOPOLL: ADVERTENCIA: CPU: 0 PID: 28 en io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring /io_uring.c:734 CPU: 0 PID: 28 Comm: kworker/u4:1 No contaminado 6.2.0-rc3-syzkaller-16369-g358a161a6a9e #0 Cola de trabajo: events_unbound io_ring_exit_work Seguimiento de llamadas: io_cqring_event_overflow+0x1c0/0x230 durante. c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [en l\u00ednea] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c /0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 Process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 trabajador_thread+0x340/0x610 ue.c:2436 khilo+ 0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 No hay ning\u00fan problema real para IOPOLL normal ya que tambi\u00e9n se llama a descarga con uring_lock tomado, pero se est\u00e1 volviendo m\u00e1s complicado para IOPOLL |SQPOLL, para el cual __io_cqring_overflow_flush() ocurre desde la ruta de espera de CQ."}], "id": "CVE-2023-52903", "lastModified": "2026-08-04T10:18:48.153", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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-2023-52903", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:03:21.069603Z", "version": "2.0.3"}}]}, "published": "2024-08-21T07:15:06.480", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/544d163d659d45a206d8929370d5a2984e546cb7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7fc3990dad04a677606337ebc61964094d6cb41b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/de77faee280163ff03b7ab64af6c9d779a43d4c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ed4629d1e968359fbb91d0a3780b1e86a2c08845"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: io_uring: lock overflowing for IOPOLL", "id": "2306431", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2306431"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H", "status": "draft"}, "cwe": "CWE-667", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nio_uring: lock overflowing for IOPOLL\nsyzbot reports an issue with overflow filling for IOPOLL:\nWARNING: CPU: 0 PID: 28 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\nCPU: 0 PID: 28 Comm: kworker/u4:1 Not tainted 6.2.0-rc3-syzkaller-16369-g358a161a6a9e #0\nWorkqueue: events_unbound io_ring_exit_work\nCall trace:\n\u00a0io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734\n\u00a0io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773\n\u00a0io_fill_cqe_req io_uring/io_uring.h:168 [inline]\n\u00a0io_do_iopoll+0x474/0x62c io_uring/rw.c:1065\n\u00a0io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513\n\u00a0io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056\n\u00a0io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869\n\u00a0process_one_work+0x2d8/0x504 kernel/workqueue.c:2289\n\u00a0worker_thread+0x340/0x610 kernel/workqueue.c:2436\n\u00a0kthread+0x12c/0x158 kernel/kthread.c:376\n\u00a0ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863\nThere is no real problem for normal IOPOLL as flush is also called with\nuring_lock taken, but it's getting more complicated for IOPOLL|SQPOLL,\nfor which __io_cqring_overflow_flush() happens from the CQ waiting path.", "A denial of service vulnerability was found in the Linux kernel. A lock in IOPOLL|SQPOLL will cause a crash."], "name": "CVE-2023-52903", "package_state": [{"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52903\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52903\nhttps://lore.kernel.org/linux-cve-announce/2024082113-CVE-2023-52903-ad59@gregkh/T"], "threat_severity": "Moderate"}

{}