The update for critical JBIG2 code execution vulnerability affecting Adobe Acrobat and Reader products has been released recently. The advisory is located here and as expected there is no patch for older 8.x versions yet.
The newest version knows the version number Acrobat 9.1.
If you are using Adobe Reader visit the address get.adobe.com/reader ASAP.
Additionally, OS X's Preview and several Linux PDF viewers are waiting for the patch still.
Kommentit