IOKit in Apple iOS before 8 and Apple TV before 7 does not properly initialize kernel memory, which allows attackers to obtain sensitive memory-content information via an application that makes crafted IOKit function calls.
https://support.apple.com/kb/HT6535
https://exchange.xforce.ibmcloud.com/vulnerabilities/96078
http://www.securitytracker.com/id/1030866
http://www.securityfocus.com/bid/69912
http://www.securityfocus.com/bid/69882
http://support.apple.com/kb/HT6442
http://support.apple.com/kb/HT6441
http://archives.neohapsis.com/archives/bugtraq/2014-10/0101.html
http://archives.neohapsis.com/archives/bugtraq/2014-09/0107.html
http://archives.neohapsis.com/archives/bugtraq/2014-09/0106.html