Libreswan 3.16 might allow remote attackers to cause a denial of service (daemon restart) via an IKEv2 aes_xcbc transform.
https://libreswan.org/security/CVE-2016-3071/CVE-2016-3071.txt
http://www.securityfocus.com/bid/87295
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182130.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182050.html