IOHIDFamily in Apple OS X before 10.10.2 allows attackers to execute arbitrary code in a kernel context or cause a denial of service (write to kernel memory) via a crafted app that calls an unspecified user-client method.
https://exchange.xforce.ibmcloud.com/vulnerabilities/100513
http://www.securitytracker.com/id/1031650
http://support.apple.com/HT204244
http://lists.apple.com/archives/security-announce/2015/Jan/msg00003.html