{"id":"CVE-2026-74512","title":"audit: fix potential use-after-free in audit_del_rule()","summary":"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-vis…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 93616c567469510b7bba55b2674e0c4523fd7e64","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 3f82927b399d7a276c0c12b6ff4424b747a0c9a7","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 8ae135a8962be9d4e8a131eb18eb06cdf02a47ce","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 45bf3df5b32e5a49953e7ceabc55f7dd85380e46","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < cae0dfed5d307b240bff71c3cf206652d1b6f215","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 5b8f46864f06d6dbacb7dcea52bc084dfd122638","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 246df90b5f1a8a6e6abbd2f058b029558720adec","Linux 4.3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:58:42.622737Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:51.743Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74512","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"}],"tags":["cve.org"],"epss":0.00126,"epssPercentile":0.0203,"ingestedAt":"2026-10-16T19:46:24.350Z","slug":"CVE-2026-74512","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 93616c567469510b7bba55b2674e0c4523fd7e64`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 3f82927b399d7a276c0c12b6ff4424b747a0c9a7`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 8ae135a8962be9d4e8a131eb18eb06cdf02a47ce`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 45bf3df5b32e5a49953e7ceabc55f7dd85380e46`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < cae0dfed5d307b240bff71c3cf206652d1b6f215`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 5b8f46864f06d6dbacb7dcea52bc084dfd122638`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 246df90b5f1a8a6e6abbd2f058b029558720adec`\n- `Linux 4.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}