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CVE-2026-74512

audit: fix potential use-after-free in audit_del_rule()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

In the Linux kernel, the following vulnerability has been resolved: audit: fix potential use-after-free in audit_del_rule() `audit_del_rule()` destroys `e->rule.exe` via `audit_remove_mark_rule()` before unlinking the rule from RCU-visible filter lists and waiting for a grace period. Concurrent readers in `audit_filter()` and `audit_filter_rules()` still dereference `e->rule.exe`, while the fsnotify mark can be freed on an independent lifetime path. This creates a use-after-free window during rule deletion. Fix this by unlinking the rule from the RCU-visible lists and invoking `synchronize_rcu()` before calling `audit_remove_mark_rule()` (and other rule removal helpers). This ensures that all existing RCU readers have exited the critical section before any underlying resources are destroyed.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 34d99af52ad40bd498ba66970579a5bc1fb1a3bc · fixed in 93616c567469510b7bba55b2674e0c4523fd7e64; From 34d99af52ad40bd498ba66970579a5bc1fb1a3bc · fixed in 3f82927b399d7a276c0c12b6ff4424b747a0c9a7; From 34d99af52ad40bd498ba66970579a5bc1fb1a3bc · fixed in 8ae135a8962be9d4e8a131eb18eb06cdf02a47ce; From 34d99af52ad40bd498ba66970579a5bc1fb1a3bc · fixed in 45bf3df5b32e5a49953e7ceabc55f7dd85380e46; From 34d99af52ad40bd498ba66970579a5bc1fb1a3bc · fixed in 78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf; From 34d99af52ad40bd498ba66970579a5bc1fb1a3bc · fixed in cae0dfed5d307b240bff71c3cf206652d1b6f215; From 34d99af52ad40bd498ba66970579a5bc1fb1a3bc · fixed in 5b8f46864f06d6dbacb7dcea52bc084dfd122638; From 34d99af52ad40bd498ba66970579a5bc1fb1a3bc · fixed in 246df90b5f1a8a6e6abbd2f058b029558720adec

  • Linux Linux

    4.3

  • KernelLinux

    From 4.3.0 · fixed in 5.10.265; From 5.11.0 · fixed in 5.15.216; From 5.16.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.151; From 6.7.0 · fixed in 6.12.103; From 6.13.0 · fixed in 6.18.44; From 6.19.0 · fixed in 7.1.8

References 8

git.kernel.org