CVE-2008-0990
notifyd in Apple Mac OS X 10.4.11 does not verify that Mach port death notifications have originated from the kernel, which allows local users to cause a denial of service via spoofed death notifications that prevent other applications from receiving notifications.
Date published : 2008-03-18
http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html