CVE-2007-1521
Double free vulnerability in PHP before 4.4.7, and 5.x before 5.2.2, allows context-dependent attackers to execute arbitrary code by interrupting the session_regenerate_id function, as demonstrated by calling a userspace error handler or triggering a memory limit violation.
Date published : 2007-03-20
http://lists.apple.com/archives/security-announce//2007/Jul/msg00004.html