libutils in Android through 5.1.1 LMY48M allows remote attackers to execute arbitrary code via crafted metadata in a (1) MP3 or (2) MP4 file, as demonstrated by an attack against use of libutils by libstagefright in Android 5.x.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.