The ATM implementation in the Linux kernel before 3.6 does not initialize certain structures, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3c0c5cfdcd4d69ffc4b9c0907cec99039f30a50a
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e862f1a9b7df4e8196ebec45ac62295138aa3fc2
rhn.redhat.com/errata/RHSA-2013-0744.html
www.openwall.com/lists/oss-security/2013/03/05/13
www.ubuntu.com/usn/USN-1805-1
www.ubuntu.com/usn/USN-1808-1
github.com/torvalds/linux/commit/3c0c5cfdcd4d69ffc4b9c0907cec99039f30a50a
github.com/torvalds/linux/commit/e862f1a9b7df4e8196ebec45ac62295138aa3fc2
www.kernel.org/pub/linux/kernel/v3.x/patch-3.6.bz2