CVE-2026-47328: Canonical Ubuntu Linux

Medium severity, CVSS 6.1. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

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.