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 2016-05-01 does not initialize certain data structures which allows attackers to obtain sensitive information via a crafted application related to IGraphicBufferConsumer.cpp and IGraphicBufferProducer.cpp aka internal bug 27556038.