CVE-2009-1388
The ptrace_start function in kernel/ptrace.c in the Linux kernel 2.6.18 does not properly handle simultaneous execution of the do_coredump function, which allows local users to cause a denial of service (deadlock) via vectors involving the ptrace system call and a coredumping thread.
Date published : 2009-07-05
http://www.securityfocus.com/bid/35559
http://www.securityfocus.com/archive/1/507985/100/0/threaded