IOKit in IOAcceleratorFamily in Apple OS X before 10.9.5 allows attackers to execute arbitrary code in a privileged context or cause a denial of service (NULL pointer dereference) via an application that provides crafted API arguments.
https://exchange.xforce.ibmcloud.com/vulnerabilities/96051
https://code.google.com/p/google-security-research/issues/detail?id=31
http://www.securitytracker.com/id/1030868