CVE-2016-3751
Unspecified vulnerability in libpng before 1.6.20, as used 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 23265085.
Date published : 2016-07-10
http://source.android.com/security/bulletin/2016-07-01.html
https://android.googlesource.com/platform/external/libpng/+/9d4853418ab2f754c2b63e091c29c5529b8b86ca