Created attachment 176414 [details]
Builds fine on Poudriere with 11.0 with both c6 and c6_64.
It's a security update, but since it touches the Linux kernel, I don't think the vulnerability can be used on FreeBSD.
A commit references this bug:
Date: Wed Nov 2 11:29:38 UTC 2016
New revision: 425139
Update kernel-headers to 2.6.32-642.6.2.el6.
Submitted by: Piotr Kubaj <firstname.lastname@example.org>