CVE-2006-4486
Integer overflow in memory allocation routines in PHP before 5.1.6, when running on a 64-bit system, allows context-dependent attackers to bypass the memory_limit restriction.
Date published : 2006-08-31
http://www.securityfocus.com/bid/19582
http://www.securityfocus.com/archive/1/447866/100/0/threaded