Adobe Flash Player versions 23.0.0.207 and earlier, 11.2.202.644 and earlier have an exploitable use after free vulnerability in the MovieClip class related to objects at multiple presentation levels. Successful exploitation could lead to arbitrary code execution.
https://security.gentoo.org/glsa/201701-17
https://helpx.adobe.com/security/products/flash-player/apsb16-39.html
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-154
http://www.zerodayinitiative.com/advisories/ZDI-16-626