for anyone who thinks Linux is a safe OS, check out this link...
Evil code found...
a recently found expoit in virtually *every* Linux distribution aside from a couple Gentoo variants, allows crash and subsequent hard lock of a Linux-based machine, server or workstation, and leaves the filesystem dirty, requiring a fsck at reboot.
scary thing about this one is that ROOT ACCESS IS NOT REQUIRED AT ALL. any shell account can execute the code and bring the machine down, glad i don't trust Linux for any of my servers, *BSD or upward only for me..