nghttp2 before 1.7.1 allows remote attackers to cause a denial of service (memory exhaustion).
https://security.gentoo.org/glsa/201612-13
https://github.com/nghttp2/nghttp2/releases/tag/v1.7.1
https://github.com/nghttp2/nghttp2/compare/v1.7.0...v1.7.1
https://bugzilla.redhat.com/show_bug.cgi?id=1308461
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177666.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177308.html