Array index error in the xnu (Mach) kernel in Apple Mac OS X 10.5 before 10.5.7 allows local users to gain privileges or cause a denial of service (system shutdown) via unspecified vectors related to workqueues.
https://exchange.xforce.ibmcloud.com/vulnerabilities/50489
http://www.vupen.com/english/advisories/2009/1297
http://www.us-cert.gov/cas/techalerts/TA09-133A.html
http://www.securitytracker.com/id?1022213
http://support.apple.com/kb/HT3549
http://secunia.com/advisories/35074
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=797