Linux kernel (OMAP4) regression

2015-06-21T00:00:00
ID USN-2641-2
Type ubuntu
Reporter Ubuntu
Modified 2015-06-21T00:00:00

Description

The Fix for CVE-2015-1328 introduced a regression into the Linux kernel’s overlayfs file system. The removal of a directory that only exists on the lower layer results in a kernel panic.

We apologize for the inconvenience.

Original advisory details:

Philip Pettersson discovered a privilege escalation when using overlayfs mounts inside of user namespaces. A local user could exploit this flaw to gain administrative privileges on the system.