The NuPlayer::GenericSource::notifyPreparedAndCleanup function in media/libmediaplayerservice/nuplayer/GenericSource.cpp in mediaserver in Android 5.x before 5.1.1 LMY49G and 6.x before 2016-02-01 improperly manages mDrmManagerClient objects, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted media file, aka internal bug 25070434.