AMD fglrx-driver before 15.7 allows local users to gain privileges via a symlink attack.
packetstormsecurity.com/files/134121/AMD-fglrx-driver-14.4.2-Privilege-Escalation.html
seclists.org/fulldisclosure/2015/Oct/104
www.securityfocus.com/archive/1/536783/100/0/threaded
www.securityfocus.com/bid/77357
www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2015-7723/