It was discovered that information could be leaked when reading broadcast messages from the notify_policy interface of the IPSec key_socket, allowing a local user to examine potentially sensitive information in kernel memory. For more information please take a look at the CVE-2013-2237 reference, as it affects other Linux operating systems as well. The security flaw can be fixed if you upgrade your system(s) to the linux-image-3.2.0-55 (3.2.0-55.85) package(s). To apply the update, run the Update Manager application of read the following instructions https://wiki.ubuntu.com/Security/Upgrades.