I can confirm that virtualbox 5.1.34-dfsg-0ubuntu1.16.04.1 and virtualbox-ext-pack 5.1.34-0ubuntu1.16.04.1 work on Xenial with the Linux Kernel 4.13.0-36 without any freeze. I cannot test the other packages or those on Artful at the moment.
Thanks for the effort to fix this!
I can confirm that virtualbox 5.1.34- dfsg-0ubuntu1. 16.04.1 and virtualbox-ext-pack 5.1.34- 0ubuntu1. 16.04.1 work on Xenial with the Linux Kernel 4.13.0-36 without any freeze. I cannot test the other packages or those on Artful at the moment.
Thanks for the effort to fix this!