Hopefully there are a bunch of programmers there right now standing in a circle around the desk of some manager and bombarding them with a continuous chant of "We told you so!" We knew in the 1990s not to trust stuff coming in off the Internet to be what it claims or reach its destination unmangled, and as I understand it, the software was blindly attempting to parse unverified threat definition files it had downloaded. Doing it all in ring 0 was just that extra crowning touch. This should have been caught before it even got to QA.