Adobe has released security updates for Adobe Flash Player 11.5.502.149 and earlier versions for Windows and Macintosh, Adobe Flash Player 184.108.40.2062 and earlier versions for Linux, Adobe Flash Player 220.127.116.11 and earlier versions for Android 4.x, and Adobe Flash Player 18.104.22.168 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.
To verify the version of Adobe Flash Player installed on your system, access the About Flash Player page, or right-click on content running in Flash Player and select “About Adobe (or Macromedia) Flash Player” from the menu. If you use multiple browsers, perform the check for each browser you have installed on your system.
To verify the version of Adobe Flash Player for Android, go to Settings > Applications > Manage Applications > Adobe Flash Player x.x.
The Adobe Flash version information page can be found here: http://www.adobe.com/software/flash/about/