Adobe Flash Player versions 24.0.0.186 and earlier have an exploitable memory corruption vulnerability due to a concurrency error when manipulating a display list. 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://rhn.redhat.com/errata/RHSA-2017-0057.html
http://packetstormsecurity.com/files/140463/Adobe-Flash-24.0.0.186-Code-Execution.html