The dev_ifconf function in net/socket.c in the Linux kernel before 3.6 does not initialize a certain structure, 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%3Ba=commit%3Bh=43da5f2e0d0c69ded3d51907d9552310a6b545e8
www.openwall.com/lists/oss-security/2013/03/05/13
www.ubuntu.com/usn/USN-1792-1
www.ubuntu.com/usn/USN-1798-1
github.com/torvalds/linux/commit/43da5f2e0d0c69ded3d51907d9552310a6b545e8
www.kernel.org/pub/linux/kernel/v3.x/patch-3.6.bz2