CVE-2012-0055: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 1.2% chance of exploitation in the next 30 days.

OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow attackers to bypass security restrictions and perform unauthorized actions.

Affected products

• Canonical Ubuntu Linux: version 10.04 only; version 11.10 only
• Linux Linux Kernel: before 3.0.0 (fixed in 3.0.0)

Published 2020-02-19. Last modified 2026-06-16.