The updates apply to Windows, to the Macintosh, and to the Linux operating system.
The security bulletin said that Adobe is aware of an exploit used in attacks against older versions of the Flash player.
Affected software includes the Flash Player Desktop Runtime, Flash Player for Linux, Flash Player for Google Chrome, and Flash Player for Internet Explorer 10 and Internet Explorer 11.
You can find details of what you need to do by going to this page. The patch itself won’t be available until next week, it seems.