CVE-2026-47331: Use-after-free in Ubuntu Linux AppArmor notification handling
Last updated 5 June 2026
Other sources
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.
— NVD
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.257-1Fixed in 6.1.170-3Fixed in 6.1.174-1Fixed in 6.12.86-1Fixed in 6.12.90-2Fixed in 7.0.10-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.257-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.170-3 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.174-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.12.86-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.12.90-2 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 7.0.10-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-47331?
The severity of CVE-2026-47331 is high, with a score of 7.8.
How do I fix CVE-2026-47331?
To fix CVE-2026-47331, apply the latest security patches released for Ubuntu Linux.
What is the impact of CVE-2026-47331?
The impact of CVE-2026-47331 includes the potential for arbitrary code execution via a use-after-free vulnerability.
Who is affected by CVE-2026-47331?
Unprivileged local users on Ubuntu Linux 6.8 can be affected by CVE-2026-47331.
What is a use-after-free vulnerability in the context of CVE-2026-47331?
In the context of CVE-2026-47331, a use-after-free vulnerability occurs when a program uses memory after it has been freed, leading to potential exploitation.