CVE-2006-3017
zend_hash_del_key_or_index in zend_hash.c in PHP before 4.4.3 and 5.x before 5.1.3 can cause zend_hash_del to delete the wrong element, which prevents a variable from being unset even when the PHP unset function is called, which might cause the variable’s value to be used in security-relevant operations.
Date published : 2006-06-14
http://www.securityfocus.com/bid/17843
http://www.securityfocus.com/archive/1/442437/100/0/threaded