The llc_ui_getname function in net/llc/af_llc.c in the Linux kernel 2.6.31-rc7 and earlier does not initialize a certain data structure, which allows local users to read the contents of some kernel memory locations by calling getsockname on an AF_LLC socket.
https://exchange.xforce.ibmcloud.com/vulnerabilities/52732
http://www.ubuntu.com/usn/USN-852-1
http://www.openwall.com/lists/oss-security/2009/08/26/1
http://www.exploit-db.com/exploits/9513