CVE-2009-0028
The clone system call in the Linux kernel 2.6.28 and earlier allows local users to send arbitrary signals to a parent process from an unprivileged child process by launching an additional child process with the CLONE_PARENT flag, and then letting this new process exit.
Date published : 2009-02-27
http://www.securityfocus.com/bid/33906
http://www.securityfocus.com/archive/1/503610/100/0/threaded