{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74512", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.909Z", "datePublished": "2026-08-15T12:27:33.736Z", "dateUpdated": "2026-08-19T16:38:09.879Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:38:09.879Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naudit: fix potential use-after-free in audit_del_rule()\n\n`audit_del_rule()` destroys `e->rule.exe` via `audit_remove_mark_rule()`\nbefore unlinking the rule from RCU-visible filter lists and waiting for a\ngrace period. Concurrent readers in `audit_filter()` and\n`audit_filter_rules()` still dereference `e->rule.exe`, while the fsnotify\nmark can be freed on an independent lifetime path. This creates a\nuse-after-free window during rule deletion.\n\nFix this by unlinking the rule from the RCU-visible lists and invoking\n`synchronize_rcu()` before calling `audit_remove_mark_rule()` (and other\nrule removal helpers). This ensures that all existing RCU readers have\nexited the critical section before any underlying resources are destroyed." } ], "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 - Reachable only via local NETLINK_AUDIT (AUDIT_DEL_RULE) or filesystem events that autoremove AUDIT_EXE rules; concurrent UAF readers run in syscall/io_uring exit audit filtering on the local host, not from remote network input.\nAC:L - The attacker controls both sides of the race by deleting an AUDIT_EXE rule (auditctl or deleting/moving the audited executable) while driving concurrent syscall/io_uring activity to keep RCU readers in audit_filter()/audit_filter_rules().\nPR:L - Besides CAP_AUDIT_CONTROL netlink deletion, unprivileged local users can trigger audit_del_rule() via fsnotify autoremove when deleting/moving an admin-configured audited executable they can write, without init-namespace root.\nUI:N - Exploitation requires no victim interaction; the attacker schedules rule deletion and concurrent audited syscalls/io_uring exits to hit the UAF window.\nS:U - Impact is kernel heap memory corruption and local privilege escalation within the host kernel security domain, not a documented cross-VM or IOMMU boundary escape.\nC:H - Use-after-free of audit_fsnotify_mark while audit_exe_compare()/audit_mark_compare() dereference mark->ino/dev enables arbitrary kernel memory reads and info disclosure primitives.\nI:H - Freed fsnotify mark objects can be reallocated and corrupted to obtain arbitrary kernel writes, control-flow hijack, and local root code execution beyond audit rule deletion.\nA:H - Concurrent dereference of a freed audit_fsnotify_mark during audit filtering can immediately oops/panic the kernel; repeated triggering yields reliable denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/auditfilter.c" ], "versions": [ { "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc", "lessThan": "93616c567469510b7bba55b2674e0c4523fd7e64", "status": "affected", "versionType": "git" }, { "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc", "lessThan": "3f82927b399d7a276c0c12b6ff4424b747a0c9a7", "status": "affected", "versionType": "git" }, { "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc", "lessThan": "8ae135a8962be9d4e8a131eb18eb06cdf02a47ce", "status": "affected", "versionType": "git" }, { "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc", "lessThan": "45bf3df5b32e5a49953e7ceabc55f7dd85380e46", "status": "affected", "versionType": "git" }, { "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc", "lessThan": "78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf", "status": "affected", "versionType": "git" }, { "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc", "lessThan": "cae0dfed5d307b240bff71c3cf206652d1b6f215", "status": "affected", "versionType": "git" }, { "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc", "lessThan": "5b8f46864f06d6dbacb7dcea52bc084dfd122638", "status": "affected", "versionType": "git" }, { "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc", "lessThan": "246df90b5f1a8a6e6abbd2f058b029558720adec", "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/auditfilter.c" ], "versions": [ { "version": "4.3", "status": "affected" }, { "version": "0", "lessThan": "4.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.8", "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": "4.3", "versionEndExcluding": "5.10.265" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.6.151" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.12.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.18.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.1.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/93616c567469510b7bba55b2674e0c4523fd7e64" }, { "url": "https://git.kernel.org/stable/c/3f82927b399d7a276c0c12b6ff4424b747a0c9a7" }, { "url": "https://git.kernel.org/stable/c/8ae135a8962be9d4e8a131eb18eb06cdf02a47ce" }, { "url": "https://git.kernel.org/stable/c/45bf3df5b32e5a49953e7ceabc55f7dd85380e46" }, { "url": "https://git.kernel.org/stable/c/78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf" }, { "url": "https://git.kernel.org/stable/c/cae0dfed5d307b240bff71c3cf206652d1b6f215" }, { "url": "https://git.kernel.org/stable/c/5b8f46864f06d6dbacb7dcea52bc084dfd122638" }, { "url": "https://git.kernel.org/stable/c/246df90b5f1a8a6e6abbd2f058b029558720adec" } ], "title": "audit: fix potential use-after-free in audit_del_rule()", "x_generator": { "engine": "bippy-1.2.0" } } } }