A denial of service condition exists in the PaX kernel patch for the 2.6 series that will put the kernel in an infinite loop when ASLR is enabled.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/33232/PaX26DoS.txt
Source: https://packetstormsecurity.com/files/33232/PaX26DoS.txt.html