Adobe Flash Player versions 26.0.0.131 and earlier have an exploitable memory corruption vulnerability in the Action Script 2 BitmapData class. Successful exploitation could lead to memory address disclosure.
https://security.gentoo.org/glsa/201707-15
https://helpx.adobe.com/security/products/flash-player/apsb17-21.html
https://access.redhat.com/errata/RHSA-2017:1731