http://www.theregister.co.uk/2009/08/14/critical_linux_bug/
http://www.networkworld.com/community/blog/linux-finally-fix...
http://it.slashdot.org/story/11/06/20/2257229/13-year-old-pa...
You're trying to apply an impossible standard to closed source software that software that was that developed from the start to be open source and developed in the open cannot meet.