Use-after-free vulnerability in the mm-video-v4l2 venc component 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 allows attackers to gain privileges via a crafted application as demonstrated by obtaining Signature or SignatureOrSystem access aka internal bug 27903498.