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.
http://archives.neohapsis.com/archives/bugtraq/2014-09/0106.html
http://archives.neohapsis.com/archives/bugtraq/2014-09/0107.html
http://archives.neohapsis.com/archives/bugtraq/2014-10/0101.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/96078
https://support.apple.com/kb/HT6535
http://support.apple.com/kb/HT6441