media/libmediaplayerservice/nuplayer/GenericSource.cpp in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-07-01 does not validate certain track data, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted media file, aka internal bug 28799341.
https://android.googlesource.com/platform/frameworks/av/+/f81038006b4c59a5a148dcad887371206033c28f
https://android.googlesource.com/platform/frameworks/av/+/d112f7d0c1dbaf0368365885becb11ca8d3f13a4