An elevation of privilege vulnerability in libstagefright in Mediaserver in Android 7.0 before 2016-11-01 could enable a local malicious application to execute arbitrary code within the context of a privileged process. This issue is rated as High because it could be used to gain local access to elevated capabilities, which are not normally accessible to a third-party application. Android ID: A-31385713.
https://source.android.com/security/bulletin/2016-11-01.html
https://android.googlesource.com/platform/frameworks/av/+/1d4feebdb85db46e138530f360d9ff2490e14353