{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-46713", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.254Z", "datePublished": "2024-09-13T14:49:13.691Z", "dateUpdated": "2026-08-05T11:38:06.321Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:38:06.321Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/aux: Fix AUX buffer serialization\n\nOle reported that event->mmap_mutex is strictly insufficient to\nserialize the AUX buffer, add a per RB mutex to fully serialize it.\n\nNote that in the lock order comment the perf_event::mmap_mutex order\nwas already wrong, that is, it nesting under mmap_lock is not new with\nthis patch." } ], "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 triggered purely through the local perf_event_open(2) syscall plus mmap/munmap on the resulting file descriptor; there is no network or remote path to the perf AUX buffer code.\nAC:L - The attacker controls both sides of the race, spawning two threads that concurrently mmap and close the same shared AUX buffer (linked via PERF_EVENT_IOC_SET_OUTPUT), and can retry freely, so triggering the unserialized window is reliable.\nPR:L - An unprivileged local user can open an AUX-capable per-task perf event (e.g. self-tracing) under common perf_event_paranoid settings and set up the shared ring buffer; no real root or init-namespace admin capability is required.\nUI:N - The attacker performs all syscalls itself; no victim action or interaction is needed to trigger the race.\nS:U - The corruption stays within the kernel's own security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The race yields a use-after-free of freed AUX kernel heap pages, which can be reallocated and read back, giving an attacker control over freed object contents and enabling kernel memory disclosure.\nI:H - The UAF/double-free on AUX pages and rb refcount corruption provides a write primitive over reclaimed kernel heap memory, exploitable via heap grooming for arbitrary writes and control-flow hijacking.\nA:H - The use-after-free and refcount underflow reliably corrupt kernel memory, causing oops/panic and full denial of service even when not fully weaponized." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/events/core.c", "kernel/events/internal.h", "kernel/events/ring_buffer.c" ], "versions": [ { "version": "45bfb2e50471abbbfd83d40d28c986078b0d24ff", "lessThan": "7882923f1cb88dc1a17f2bf0c81b1fc80d44db82", "status": "affected", "versionType": "git" }, { "version": "45bfb2e50471abbbfd83d40d28c986078b0d24ff", "lessThan": "52d13d224fdf1299c8b642807fa1ea14d693f5ff", "status": "affected", "versionType": "git" }, { "version": "45bfb2e50471abbbfd83d40d28c986078b0d24ff", "lessThan": "9dc7ad2b67772cfb94ceb3b0c9c4023c2463215d", "status": "affected", "versionType": "git" }, { "version": "45bfb2e50471abbbfd83d40d28c986078b0d24ff", "lessThan": "c4b69bee3f4ef76809288fe6827bc14d4ae788ef", "status": "affected", "versionType": "git" }, { "version": "45bfb2e50471abbbfd83d40d28c986078b0d24ff", "lessThan": "b9b6882e243b653d379abbeaa64a500182aba370", "status": "affected", "versionType": "git" }, { "version": "45bfb2e50471abbbfd83d40d28c986078b0d24ff", "lessThan": "2ab9d830262c132ab5db2f571003d80850d56b2a", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/events/core.c", "kernel/events/internal.h", "kernel/events/ring_buffer.c" ], "versions": [ { "version": "4.1", "status": "affected" }, { "version": "0", "lessThan": "4.1", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.226", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.167", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.110", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.51", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.10", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "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": "4.1", "versionEndExcluding": "5.10.226" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "5.15.167" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.1.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.6.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.10.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/7882923f1cb88dc1a17f2bf0c81b1fc80d44db82" }, { "url": "https://git.kernel.org/stable/c/52d13d224fdf1299c8b642807fa1ea14d693f5ff" }, { "url": "https://git.kernel.org/stable/c/9dc7ad2b67772cfb94ceb3b0c9c4023c2463215d" }, { "url": "https://git.kernel.org/stable/c/c4b69bee3f4ef76809288fe6827bc14d4ae788ef" }, { "url": "https://git.kernel.org/stable/c/b9b6882e243b653d379abbeaa64a500182aba370" }, { "url": "https://git.kernel.org/stable/c/2ab9d830262c132ab5db2f571003d80850d56b2a" } ], "title": "perf/aux: Fix AUX buffer serialization", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-29T14:58:57.910208Z", "id": "CVE-2024-46713", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T14:59:13.207Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:16:42.290Z" } } ] } }