Adobe Flash Player versions 29.0.0.113 and earlier have an exploitable Use-After-Free vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.
https://security.gentoo.org/glsa/201804-11
https://helpx.adobe.com/security/products/flash-player/apsb18-08.html
https://access.redhat.com/errata/RHSA-2018:1119