Zend/zend_exceptions.c in PHP, possibly 5.x before 5.6.28 and 7.x before 7.0.13, allows remote attackers to cause a denial of service (infinite loop) via a crafted Exception object in serialized data, a related issue to CVE-2015-8876.
https://www.youtube.com/watch?v=LDcaPstAuPk
https://security.netapp.com/advisory/ntap-20180112-0001/
http://www.securityfocus.com/bid/95150
http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf