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TI-2026-34907 Aliases CVE-2026-47331GHSA-2qg4-q443-hfg6

Use-after-free in Ubuntu Linux AppArmor notification handling

Priority LOW 35CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An unprivileged local user could trigger the race condition that can lead to a use-after-free (UAF) and, theoretically, arbitrary code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00114 1st percentileScored 2026-11-07
Fix Fixed Ubuntu Linux (Canonical): 6.8.0-124.124

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CanonicalUbuntu Linux6.8.0 to before 6.8.0-124.1246.8.0-124.124Patch availableCNA
  • Ubuntu Linux VendorCanonical Affected 6.8.0 to before 6.8.0-124.124 Fixed in 6.8.0-124.124 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:canonical:ubuntu_linux:24.04:*:*:*:*:*:*:*24.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:25.10:*:*:*:*:*:*:*25.10VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:26.04:*:*:*:*:*:*:*26.04VulnerableCanonical
  • cpe:2.3:o:canonical:ubuntu_linux:24.04:*:*:*:*:*:*:* Versions 24.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:25.10:*:*:*:*:*:*:* Versions 25.10 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:26.04:*:*:*:*:*:*:* Versions 26.04 Vulnerable ·Canonical

Remediation

  • Fix · CNA Ubuntu Linux (Canonical) Fixed in 6.8.0-124.124

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Canonical Ubuntu Linux 6.8.0-124.124

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-34911 NULL pointer dereference in Ubuntu Linux AppArmor notification handlingPriority LOW 23
    • TI-2026-34912 Use of uninitialized value in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation rulesPriority LOW 15
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-47331
  2. 2026-10-03 Alias added: GHSA-2qg4-q443-hfg6

References

Patch 1

  • TI-2020-09349 An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2. KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-05854 smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01431 Netlogon Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-12627 Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerability than… KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-07471 OS command injection in exim KEVCVSS 3.1CRITICAL 9.8
See all 4120 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences