Multiple stack-based buffer overflows in the AVCC reassembly implementation in Utils.cpp in libstagefright in MediaMuxer in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, 6.x before 2016-09-01, and 7.0 before 2016-09-01 allow remote attackers to execute arbitrary code via a crafted media file, aka internal bug 29161888.