Obscure binary escalation exploits have been around forever. And it will only happen to you when you download obscure binary code, which is all of mswin. Perhaps some games have been using this forever, just to make things faster.
If you care about security, then go Linux and Open Source. Although obscure bugs can be found in the Linux codes, it's laid out for everybody to see. And nobody can really sneak it through in application code. It remains to be seen if somebody can run it as a user in a multi-user system. This is easily swatted by compilers.
Any big system that runs mswin has been compromised, but they just don't know it. They only know it when newspapers can buy the entire retina database of India for a buck.