CVE-2026-47333: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the size of an internal buffer, leading to a heap memory out-of-bounds read in notification handling code. The bug can be triggered by an unprivileged local user and can result in invalid data being processed by the AppArmor DFA policy engine.

Affected products

• Canonical Ubuntu Linux: version 24.04 only; version 25.10 only; version 26.04 only

Published 2026-05-28. Last modified 2026-06-17.