CVE-2001-1559
The uipc system calls (uipc_syscalls.c) in OpenBSD 2.9 and 3.0 provide user mode return instead of versus rval kernel mode values to the fdrelease function, which allows local users to cause a denial of service and trigger a null dereference.
Date published : 2005-07-14
http://archives.neohapsis.com/archives/bugtraq/2001-12/0014.html