Ubuntu Update for Linux kernel vulnerabilities USN-1196-1
Please Install the Updated Packages.
It was discovered that eCryptfs incorrectly handled permissions when modifying the mtab file. A local attacker could use this flaw to manipulate the mtab file, and possibly unmount arbitrary locations, leading to a denial of service.
ecryptfs-utils on Ubuntu 11.04 , Ubuntu 10.10 , Ubuntu 10.04 LTS