CVE-2026-74512audit: fix potential use-after-free in audit_del_rule()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 34d99af52ad40bd498ba66970579a5bc1fb1a3bc before 93616c567469510b7bba55b2674e0c4523fd7e64; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc builds before 3f82927b399d7a276c0c12b6ff4424b747a0c9a7; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc builds before 8ae135a8962be9d4e8a131eb18eb06cdf02a47ce; from 34d99af52ad40bd498ba66970579a5bc1fb1a3bc before 45bf3df5b32e5a49953e7ceabc55f7dd85380e46; from 34d99af52ad40bd498ba66970579a5bc1fb1a3bc before 78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf; from 34d99af52ad40bd498ba66970579a5bc1fb1a3bc before cae0dfed5d307b240bff71c3cf206652d1b6f215; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc builds before 5b8f46864f06d6dbacb7dcea52bc084dfd122638; from 34d99af52ad40bd498ba66970579a5bc1fb1a3bc before 246df90b5f1a8a6e6abbd2f058b029558720adec | CNA record |
References
- https://git.kernel.org/stable/c/93616c567469510b7bba55b2674e0c4523fd7e64
- https://git.kernel.org/stable/c/3f82927b399d7a276c0c12b6ff4424b747a0c9a7
- https://git.kernel.org/stable/c/8ae135a8962be9d4e8a131eb18eb06cdf02a47ce
- https://git.kernel.org/stable/c/45bf3df5b32e5a49953e7ceabc55f7dd85380e46
- https://git.kernel.org/stable/c/78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf
- https://git.kernel.org/stable/c/cae0dfed5d307b240bff71c3cf206652d1b6f215
- https://git.kernel.org/stable/c/5b8f46864f06d6dbacb7dcea52bc084dfd122638
- https://git.kernel.org/stable/c/246df90b5f1a8a6e6abbd2f058b029558720adec
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.