OMXCodec.cpp in libstagefright in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, 6.x before 2016-09-01, and 7.0 before 2016-09-01 does not validate a certain pointer, which allows remote attackers to cause a denial of service (device hang or reboot) via a crafted media file, aka internal bug 29421811.
https://android.googlesource.com/platform/frameworks/av/+/97837bb6cbac21ea679843a0037779d3834bed64
http://www.securitytracker.com/id/1036763