Ubuntu 1557-1: Linux kernel vulnerability
Summary
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 11.04: linux-image-2.6.38-15-generic 2.6.38-15.66 linux-image-2.6.38-15-generic-pae 2.6.38-15.66 linux-image-2.6.38-15-omap 2.6.38-15.66 linux-image-2.6.38-15-powerpc 2.6.38-15.66 linux-image-2.6.38-15-powerpc-smp 2.6.38-15.66 linux-image-2.6.38-15-powerpc64-smp 2.6.38-15.66 linux-image-2.6.38-15-server 2.6.38-15.66 linux-image-2.6.38-15-versatile 2.6.38-15.66 linux-image-2.6.38-15-virtual 2.6.38-15.66 After a standard system update you need to reboot your computer to make all the necessary changes.
References
https://ubuntu.com/security/notices/USN-1557-1
CVE-2012-3400
Package Information
https://launchpad.net/ubuntu/+source/linux/2.6.38-15.66