On 8 October, Adobe released an update to address a vulnerability in it’s Adobe Flash Player that can enable an attacker to crash or compromise vulnerable systems. The vulnerability affects Flash Player on Windows, Mac, Linux and Android. All users are encouraged to update. From the Adobe article:
Adobe has released security updates for Adobe Flash Player 11.4.402.278 and earlier versions for Windows, Adobe Flash Player 11.4.402.265 and earlier versions for Macintosh, Adobe Flash Player 11.2.202.238 and earlier for versions for Linux, Adobe Flash Player 11.1.115.17 and earlier versions for Android 4.x, and Adobe Flash Player 11.1.111.16 and earlier versions for Android 3.x and 2.x. These updates address vulnerabilities that could cause a crash and potentially allow an attacker to take control of the affected system
http://www.adobe.com/support/security/bulletins/apsb12-22.html