Heap-based buffer overflow in IOHIDFamily in Apple iOS before 8 and Apple TV before 7 allows attackers to execute arbitrary code in a privileged context via an application that provides crafted key-mapping properties.
https://support.apple.com/kb/HT6535
https://support.apple.com/HT204659
https://exchange.xforce.ibmcloud.com/vulnerabilities/96111
http://support.apple.com/kb/HT6442
http://support.apple.com/kb/HT6441
http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html