file before 5.18, as used in the Fileinfo component in PHP before 5.6.0, allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a zero root_storage value in a CDF file, related to cdf.c and readcdf.c.
https://bugs.php.net/bug.php?id=67329
http://php.net/ChangeLog-5.php
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=f3f22ff5c697aef854ffc1918bce708b37481b0f