ext/snmp/snmp.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 improperly interacts with the unserialize implementation and garbage collection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly have unspecified other impact via crafted serialized data, a related issue to CVE-2016-5773.
git.php.net/?p=php-src.git%3Ba=commit%3Bh=cab1c3b3708eead315e033359d07049b23b147a3
lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
openwall.com/lists/oss-security/2016/07/24/2
php.net/ChangeLog-5.php
php.net/ChangeLog-7.php
rhn.redhat.com/errata/RHSA-2016-2750.html
www.debian.org/security/2016/dsa-3631
www.securityfocus.com/bid/92094
www.securitytracker.com/id/1036430
bugs.php.net/72479
security.gentoo.org/glsa/201611-22
support.apple.com/HT207170