The exif_process_unicode function in ext/exif/exif.c in PHP before 5.4.37, 5.5.x before 5.5.21, and 5.6.x before 5.6.5 allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free and application crash) via crafted EXIF data in a JPEG image.
https://support.apple.com/HT205267
https://security.gentoo.org/glsa/201503-03
https://bugzilla.redhat.com/show_bug.cgi?id=1185472
http://www.securityfocus.com/bid/72541
http://www.php.net/ChangeLog-5.php
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:032
http://www.debian.org/security/2015/dsa-3195
http://rhn.redhat.com/errata/RHSA-2015-1218.html
http://rhn.redhat.com/errata/RHSA-2015-1135.html
http://rhn.redhat.com/errata/RHSA-2015-1066.html
http://rhn.redhat.com/errata/RHSA-2015-1053.html
http://marc.info/?l=bugtraq&m=144050155601375&w=2
http://marc.info/?l=bugtraq&m=143748090628601&w=2
http://lists.opensuse.org/opensuse-updates/2015-02/msg00079.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00029.html
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=55001de6d8c6ed2aada870a76de1e4b4558737bf
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=2fc178cf448d8e1b95d1314e47eeef610729e0df
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=21bc7464f454fec18a9ec024c738f195602fee2a