Multiple buffer overflows 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 allow attackers to gain privileges via a crafted application that provides an AudioEffect reply, as demonstrated by obtaining Signature or SignatureOrSystem access, aka internal bug 28173666.