The IOAcceleratorFamily2 interface in IOAcceleratorFamily in Apple OS X before 10.11.3 allows local users to gain privileges or cause a denial of service (memory corruption) via unspecified vectors.
https://support.apple.com/HT205731
http://zerodayinitiative.com/advisories/ZDI-16-020/
http://www.securitytracker.com/id/1034736
http://lists.apple.com/archives/security-announce/2016/Jan/msg00003.html