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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-74512

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-74512

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
        "lessThan": "93616c567469510b7bba55b2674e0c4523fd7e64",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
        "lessThan": "3f82927b399d7a276c0c12b6ff4424b747a0c9a7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
        "lessThan": "8ae135a8962be9d4e8a131eb18eb06cdf02a47ce",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
        "lessThan": "45bf3df5b32e5a49953e7ceabc55f7dd85380e46",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
        "lessThan": "78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
        "lessThan": "cae0dfed5d307b240bff71c3cf206652d1b6f215",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
        "lessThan": "5b8f46864f06d6dbacb7dcea52bc084dfd122638",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
        "lessThan": "246df90b5f1a8a6e6abbd2f058b029558720adec",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "kernel/auditfilter.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.3",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.151",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.103",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.44",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "kernel/auditfilter.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74512

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#33189 · Revision 1
Added to Heist Feed
Publisher date
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