services/soundtrigger/SoundTriggerHwService.cpp in mediaserver in Android 5.0.x before 5.0.2, 5.1.x before 5.1.1, 6.x before 2016-10-01, and 7.0 before 2016-10-01 allows attackers to gain privileges via a crafted application, aka internal bug 30148546.
https://android.googlesource.com/platform/frameworks/av/+/035cb12f392860113dce96116a5150e2fde6f0cc