Integer overflow in the fread function in ext/standard/file.c in PHP before 5.5.36 and 5.6.x before 5.6.22 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a large integer in the second argument.
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
https://github.com/php/php-src/commit/abd159cce48f3e34f08e4751c568e09677d5ec9c?w=1
http://www.securityfocus.com/bid/90861
http://www.openwall.com/lists/oss-security/2016/05/26/3
http://www.debian.org/security/2016/dsa-3602