Adobe Flash Player 21.0.0.226 and earlier allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in May 2016.
https://security.gentoo.org/glsa/201606-08
http://rhn.redhat.com/errata/RHSA-2016-1079.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00047.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00046.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00045.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00044.html