{"id":"CVE-2026-98862","title":"audit: fix exe mark UAF in kill_rules()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\naudit: fix exe mark UAF in kill_rules()\n\nkill_rules() removes mixed AUDIT_DIR and AUDIT_EXE rules when an audit\ntree is pruned. It drops entry->rule.exe before removing…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 304960900991157e6883bdf0b39782b690545ee8","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 88633025f20ba9c32ccdb3efc86eafdf98cb825c","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < f2cc5462b78559c7628a9f8ac9a9592e7783183a","Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < aa650d87a498844060eecb1d336f4d46f4d1b0b3","Linux 4.3"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:51:23.224Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98862","references":[{"url":"https://git.kernel.org/stable/c/304960900991157e6883bdf0b39782b690545ee8"},{"url":"https://git.kernel.org/stable/c/88633025f20ba9c32ccdb3efc86eafdf98cb825c"},{"url":"https://git.kernel.org/stable/c/f2cc5462b78559c7628a9f8ac9a9592e7783183a"},{"url":"https://git.kernel.org/stable/c/aa650d87a498844060eecb1d336f4d46f4d1b0b3"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.457Z","slug":"CVE-2026-98862","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\naudit: fix exe mark UAF in kill_rules()\n\nkill_rules() removes mixed AUDIT_DIR and AUDIT_EXE rules when an audit\ntree is pruned. It drops entry->rule.exe before removing the rule from\nthe RCU-visible filter lists.\n\nAfter a rule has been installed with AUDIT_ADD_RULE, which requires\nCAP_AUDIT_CONTROL, removing the watched directory can race with another\ntask that is still evaluating the rule. In that case, fsnotify can free\nthe executable mark before the reader reaches audit_mark_compare(),\ncausing a use-after-free.\n\nKASAN reports:\n\n    BUG: KASAN: slab-use-after-free in audit_mark_compare+0x8d/0xa0\n\nUnlink the published rules from the RCU-visible lists and retain them\non tree->rules for cleanup. If any rule has an executable mark, wait for\na single RCU grace period before removing the marks and scheduling the\nentries for freeing. Otherwise, call_rcu() already provides the required\ndeferred freeing without a synchronous wait.\n\n## Affected\n\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 304960900991157e6883bdf0b39782b690545ee8`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < 88633025f20ba9c32ccdb3efc86eafdf98cb825c`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < f2cc5462b78559c7628a9f8ac9a9592e7783183a`\n- `Linux >= 34d99af52ad40bd498ba66970579a5bc1fb1a3bc < aa650d87a498844060eecb1d336f4d46f4d1b0b3`\n- `Linux 4.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}