libstagefright in mediaserver in Android 4.x before 4.4.4, 5.x before 5.1.1 LMY49G, and 6.x before 2016-02-01 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted media file that triggers a large memory allocation in the (1) SoftMPEG4Encoder or (2) SoftVPXEncoder component, aka internal bug 25812794.