CVE-2015-1328: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 37.7% chance of exploitation in the next 30 days.

The overlayfs implementation in the linux (aka Linux kernel) package before 3.19.0-21.21 in Ubuntu through 15.04 does not properly check permissions for file creation in the upper filesystem directory, which allows local users to obtain root access by leveraging a configuration in which overlayfs is permitted in an arbitrary mount namespace.

Affected products

• Canonical Ubuntu Linux: up to and including 15.04
• Linux Linux Kernel: up to and including 3.19

Published 2016-11-28. Last modified 2026-06-17.