Adobe has released an advisory regarding an out of band security update for Flash, APSB15-02 ¹. It is a fix for CVE-2015-0310, which is reserved but for which there is little additional information at the NIST or Mitre sites. Most likely this is the previously reported 0day ². There are reports that this vulnerability is actively being exploited, and that it is part of a crimeware kit. This would be a highly recommended patch! If you have the Adobe Flash Player installed apply the update. All versions on all platforms appear to be vulnerable. 

1- http://helpx.adobe.com/security/products/flash-player/apsb15-02.html

2- https://isc.sans.edu/forums/diary/Flash+0Day+Exploit+Used+by+Angler+Exploit+Kit/19213/

Cheers,
Adrien de Beaupré
Intru-shun.ca Inc.
My SANS teaching schedule