OpenSSLCipher.java in Conscrypt in Android 6.x before 2016-05-01 mishandles resets of the Additional Authenticated Data (AAD) array, which allows attackers to spoof message authentication via unspecified vectors, aka internal bugs 27324690 and 27696681.
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.