Comment # 2 on bug 1067697 from Larry Finger

I have no idea what happened to your system.

I booted into Leap 42.2 and did a normal update. VirtualBox started normally,
To further test, I used YaST to remove all VirtualBox packages, and then
reinstalled them. Again, VirtualBox started normally as my normal user.

File /usr/bin/VirtualBox (Note spelling) is present, owned by root:root, and
has permissions 0755. That is what is expected. Files /usr/lib/virtualbox/VBox*
are present and also have the expected owners and permissions.