iDefense Security Advisory 05.14.09 -Local exploitation of an index validation vulnerability in Apple Inc.’s Mac OS X xnu kernel could allow an attacker to execute arbitrary code in the security context of the kernel. The Mac OS X xnu (Mach) kernel implements workqueues. This allows the kernel to schedule events to take place in a task. An input validation error exists within this implementation, which can lead to execution of arbitrary code in the kernel. Apple Inc.’s Mac OS X 10.5.2 and earlier is considered vulnerable to this issue.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/77527/05.14.09-1.txt
Source: https://packetstormsecurity.com/files/77527/iDEFENSE-Security-Advisory-2009-05-14.1.html