Screaming Penguin - Source Does Matter

Not a lot of details in the linked VNUnet story, but basically Red Hat has developed their own extensions to the Linux kernel that will shuffle memory space each time programs are loaded. The scheme here is to prevent common overflows and moreover worms from spreading because memory locations will be random. The new stuff is called Position Independent Executables (PIE). Its due out soon in RHEL 3 server.   Linux fights off worms