Adobe has released security updates for Windows, Macintosh, Linux and Android on September 10. These updates address vulnerabilities that could cause a crash and potentially allow an attacker to take control of the affected system. Adobe recommends users update their product installations to the latest versions
For Ubuntu Linux, the flash plugin was upgraded from version 126.96.36.1997 to version 188.8.131.520.
You can easily upgrade it using Synaptic Package Manager in Ubuntu 13.04, Ubuntu 12.10, Ubuntu 12.04 and Ubuntu 13.10.