Adobe Flash Player versions 24.0.0.186 and earlier have an exploitable memory corruption vulnerability related to processing of atoms in MP4 files. Successful exploitation could lead to arbitrary code execution.
https://security.gentoo.org/glsa/201702-20
https://helpx.adobe.com/security/products/flash-player/apsb17-02.html
http://www.securitytracker.com/id/1037570