{"id":"CVE-2026-74512","summary":"audit: fix potential use-after-free in audit_del_rule()","details":"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-\u003erule.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-\u003erule.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.","modified":"2026-09-18T10:11:50.101302946Z","published":"2026-08-15T12:27:33.736Z","related":["SUSE-SU-2026:23477-1","SUSE-SU-2026:23481-1","SUSE-SU-2026:23528-1","SUSE-SU-2026:23529-1","SUSE-SU-2026:4120-1","SUSE-SU-2026:4254-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74512.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/246df90b5f1a8a6e6abbd2f058b029558720adec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3f82927b399d7a276c0c12b6ff4424b747a0c9a7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/45bf3df5b32e5a49953e7ceabc55f7dd85380e46"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5b8f46864f06d6dbacb7dcea52bc084dfd122638"},{"type":"WEB","url":"https://git.kernel.org/stable/c/78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8ae135a8962be9d4e8a131eb18eb06cdf02a47ce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/93616c567469510b7bba55b2674e0c4523fd7e64"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cae0dfed5d307b240bff71c3cf206652d1b6f215"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74512.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74512"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"34d99af52ad40bd498ba66970579a5bc1fb1a3bc"},{"fixed":"93616c567469510b7bba55b2674e0c4523fd7e64"},{"fixed":"3f82927b399d7a276c0c12b6ff4424b747a0c9a7"},{"fixed":"8ae135a8962be9d4e8a131eb18eb06cdf02a47ce"},{"fixed":"45bf3df5b32e5a49953e7ceabc55f7dd85380e46"},{"fixed":"78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf"},{"fixed":"cae0dfed5d307b240bff71c3cf206652d1b6f215"},{"fixed":"5b8f46864f06d6dbacb7dcea52bc084dfd122638"},{"fixed":"246df90b5f1a8a6e6abbd2f058b029558720adec"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-74512.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.3.0"},{"fixed":"5.10.265"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-74512.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}