CVE-2026-47328

Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling

State: Published
Severity: 6.1 Medium
Published: May 28, 2026
Updated: May 28, 2026
Reserved: May 19, 2026

Description

Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.

Scores

CVSS	Score	Vector	Source
3.1	6.1 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H	canonical

Weaknesses

CWE-590 Free of memory not on the heap

Affected Products

Product	Versions
Ubuntu LinuxCanonical	6.8.0 to before 6.8.0-124.124Affected 6.17.0 to before 6.17.0-35.35Affected 7.0.0 to before 7.0.0-22.22Affected

References

https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=7f3c4902c39432ce7ea0d384cb70eba282247facpatch

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