The wanxl_ioctl function in drivers/net/wan/wanxl.c in the Linux kernel before 3.11.7 does not properly initialize a certain data structure, which allows local users to obtain sensitive information from kernel memory via an ioctl call.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2b13d06c9584b4eb773f1e80bbaedab9a1c344e1
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.11.7
www.openwall.com/lists/oss-security/2014/01/15/3
www.securityfocus.com/bid/64953
www.ubuntu.com/usn/USN-2128-1
www.ubuntu.com/usn/USN-2129-1
bugzilla.redhat.com/show_bug.cgi?id=1053613
exchange.xforce.ibmcloud.com/vulnerabilities/90444
github.com/torvalds/linux/commit/2b13d06c9584b4eb773f1e80bbaedab9a1c344e1