Linux Kernel 'pipe.c' Local Privilege Escalation Vulnerability

http://www.securityfocus.com/bid/36901

"Linux kernel is prone to a local privilege-escalation vulnerability
that is caused by a NULL-pointer dereference.

Local attackers can exploit this issue to execute arbitrary code with
kernel-level privileges. Successful exploits will result in the complete
compromise of affected computers. Failed exploit attempts will result in
a denial-of-service condition. "

This affects RHEL, SuSE, etc. Kernels before 2.6.31.5.

Check with your vendor for an update and apply as soon as possible.