Double free vulnerability in the SplDoublyLinkedList::offsetSet function in ext/spl/spl_dllist.c in PHP 7.x before 7.0.6 allows remote attackers to execute arbitrary code via a crafted index.
https://security-tracker.debian.org/tracker/CVE-2016-3132
https://php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/92356
http://github.com/php/php-src/commit/28a6ed9f9a36b9c517e4a8a429baf4dd382fc5d5?w=1