CVE-2026-47334 PUBLISHED

Deadlock or kernel panic in Ubuntu Linux AppArmor notification handling

Assigner: canonical
Reserved: 19.05.2026 Published: 28.05.2026 Updated: 28.05.2026

Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock in notification handling code. The bug can be triggered by an unprivileged local user and can result in kernel panic or deadlock.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 5.5

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Canonical
Product	Ubuntu Linux
Versions	Default: unaffected affected from 6.8.0 to 6.8.0-124.124 (excl.) affected from 6.17.0 to 6.17.0-35.35 (excl.) affected from 7.0.0 to 7.0.0-22.22 (excl.)

Credits

Tristan Madani (@TristanInSec), Talence Security finder

References

https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=f0e73aec23d13a9877fba096b1c2fd19f66e5313

Problem Types

CWE-833 Deadlock CWE