IOSurface in Apple iOS before 8.2, Apple OS X through 10.10.2, and Apple TV before 7.1 allows attackers to execute arbitrary code in a privileged context via a crafted app that leverages "type confusion" during serialized-object handling.
https://support.apple.com/kb/HT204563
https://support.apple.com/HT204426
https://support.apple.com/HT204423
https://support.apple.com/HT204413
http://www.securitytracker.com/id/1031864
http://www.securityfocus.com/bid/73004
http://lists.apple.com/archives/security-announce/2015/Mar/msg00002.html
http://lists.apple.com/archives/security-announce/2015/Mar/msg00001.html
http://lists.apple.com/archives/security-announce/2015/Mar/msg00000.html