Multiple memory leaks in XNU 1228.3.13 and earlier on Apple Mac OS X 10.5.6 and earlier allow local users to cause a denial of service (kernel memory consumption) via a crafted (1) SYS_add_profil or (2) SYS___mac_getfsstat system call.
https://www.exploit-db.com/exploits/8264
https://www.exploit-db.com/exploits/8263
http://www.informationweek.com/news/hardware/mac/showArticle.jhtml?articleID=216401181