the fix for xenial is in: virtualbox 5.1.38-dfsg-0ubuntu1.16.04.3 and virtualbox-hwe 5.1.38-dfsg-0ubuntu1.16.04.2
the fix for xenial is in: dfsg-0ubuntu1. 16.04.3 dfsg-0ubuntu1. 16.04.2
virtualbox 5.1.38-
and
virtualbox-hwe 5.1.38-