The ELF parser in file 5.16 through 5.21 allows remote attackers to cause a denial of service via a long string.
https://usn.ubuntu.com/3686-1/
https://security.gentoo.org/glsa/201503-08
https://github.com/file/file/commit/65437cee25199dbd385fb35901bc0011e164276c
http://www.openwall.com/lists/oss-security/2015/01/17/9
http://mx.gw.com/pipermail/file/2015/001660.html