A vulnerability has been discovered and corrected in php:

A heap corruption issue was reported in PHP’s exif_thumbnail()
function. A specially-crafted JPEG image could cause the PHP
interpreter to crash or, potentially, execute arbitrary code
(CVE-2014-3670).

The updated php packages have been upgraded to the 5.5.18 version
resolve this security flaw.

Additionally, php-apc has been rebuilt against the updated php
packages.