Greeting,
We are about to update the centos-release-xen package to point to Xen
4.8 rather than 4.6. I'll push the update next week.
As a reminder, you can "pin" your installation to Xen 4.6 by installing
centos-release-xen-46 and then removing centos-release-xen.
And for the more adventurous, that update will come with a new package
centos-release-xen-410 to install Xen 4.10.
(Testing will be updated today.)
Cheers,
--
Anthony PERARD