Adobe has released new versions of Flash Player for Windows, Mac and Linux, to address a vulnerability that is being exploited in the wild.
The vulnerable versions are 126.96.36.199 and earlier versions for Windows; 188.8.131.52 and earlier versions for Macintosh; and 184.108.40.2060 and earlier versions for Linux. These same versions embedded in Internet Explorer 10 and 11 and in Google Chrome will be updated automatically through those products' update mechanisms.
[UPDATE: Microsoft has released their update to versions of IE that have Flash embedded. It is the 23rd such update since the company began embeddeding Flash in IE in September 2012. As is usually the case, by the time Adobe released their update, Google had already pushed out an update to Chrome with it.]
The new versions are 220.127.116.11 for Windows and Mac and 18.104.22.1686 for Linux.
This attack and update are unrelated to the zero day IE vulnerability just disclosed, the attack for which uses a Flash .SWF file as an attack vector. In that case no vulnerability has been indicated in Flash itself.
The vulnerability, which will be designated CVE-2014-0515, was reported to Google by Alexander Polyakov of Kaspersky Labs.