Adobe released Flash Player 9.0.115 for Linux. As I use Ubuntu and Adobe doesn’t provide a deb package, I converted the rpm one to deb using the alien command.

Here you can find the Flash Player 9.0.115 for Ubuntu and Debian.

Alternatively you can download a patched non-free package (in Ubuntu and Debian the non-free package does not contain the flash player, but automatically download it from Adobe). This second alternative is the most legal one.