The NVIDIA UNIX driver before 295.40 allows local users to access arbitrary memory locations by leveraging GPU device-node read/write privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/74822
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-0969
http://www.ubuntu.com/usn/usn-1420-1/
http://secunia.com/advisories/48793