7.8

CVE-2026-74512: audit: fix potential use-after-free in audit_del_rule()

Received
AliasesUBUNTU-CVE-2026-74512DEBIAN-CVE-2026-74512
Published 15-08-2026Last modified 16-10-2026

Vulnerability summary

CVE-2026-74512 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 22 · Related 19
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1SUSE-SU-2026:23881-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.13% on 06-10-2026

06-10-202605-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 7.0.0-42.42
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 7.0.0-1016.17
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.8-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 34d99af52ad40bd498ba66970579a5bc1fb1a3bc, < 93616c567469510b7bba55b2674e0c4523fd7e64 | ≥ 34d99af52ad40bd498ba66970579a5bc1fb1a3bc, < 3f82927b399d7a276c0c12b6ff4424b747a0c9a7 | ≥ 34d99af52ad40bd498ba66970579a5bc1fb1a3bc, < 8ae135a8962be9d4e8a131eb18eb06cdf02a47ce | ≥ 34d99af52ad40bd498ba66970579a5bc1fb1a3bc, < 45bf3df5b32e5a49953e7ceabc55f7dd85380e46 | ≥ 34d99af52ad40bd498ba66970579a5bc1fb1a3bc, < 78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf | ≥ 34d99af52ad40bd498ba66970579a5bc1fb1a3bc, < cae0dfed5d307b240bff71c3cf206652d1b6f215 | ≥ 34d99af52ad40bd498ba66970579a5bc1fb1a3bc, < 5b8f46864f06d6dbacb7dcea52bc084dfd122638 | ≥ 34d99af52ad40bd498ba66970579a5bc1fb1a3bc, < 246df90b5f1a8a6e6abbd2f058b029558720adec | 4.3

3 vendors · 172 products

References

22 links
Show all 22 references