CVE-2026-47331

HIGH

Use-after-free in Ubuntu Linux AppArmor notification handling

Title source: cna

Description

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.

References (1)

Core 1

Core References

Patch patch

https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=5e5cd4759b63363373faf1ce15d1cab3606d6ec8

Scores

CVSS v3 7.8

EPSS 0.0011

EPSS Percentile 1.7%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-416

Status published

Products (4)

Canonical/Ubuntu Linux 6.8.0 - 6.8.0-124.124

canonical/ubuntu_linux 24.04

canonical/ubuntu_linux 25.10

canonical/ubuntu_linux 26.04

Published May 28, 2026

Tracked Since May 29, 2026