Integer overflow in the Region::unflatten function in libs/ui/Region.cpp in mediaserver in Android 6.x before 2016-09-01 and 7.0 before 2016-09-01 allows attackers to obtain sensitive information via a crafted application, aka internal bug 29983260.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| http://source.android.com/security/bulletin/2016-09-01.html | vendor advisory |
| http://www.securitytracker.com/id/1036763 | vdb entry |
| https://android.googlesource.com/platform/frameworks/native/+/363247929c35104b3e5ee9e637e9dcf579080aee | issue tracking patch |