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, and 6.x before 2016-06-01 allows attackers to gain privileges via a crafted application, as demonstrated by obtaining Signature or SignatureOrSystem access, aka internal bug 27833616.
android.googlesource.com/platform/frameworks/av/+/4e32001e4196f39ddd0b86686ae0231c8f5ed944
android.googlesource.com/platform/frameworks/av/+/918eeaa29d99d257282fafec931b4bda0e3bae12
android.googlesource.com/platform/frameworks/av/+/d2f47191538837e796e2b10c1ff7e1ee35f6e0ab
source.android.com/security/bulletin/2016-06-01.html