Since DUPing this morning to the big 20240329 Tumbleweed snapshot (re
CVE-2024-3094), I have again lost USB passthrough to scanners in my Win 7 VM in
Virtualbox 7.14.  

In the ~/.config/VirtualBox/VBoxSVC.log, I see many instances of:

-----------

00:00:11.669981 nspr-5   WARNING [COM]: aRC=NS_ERROR_FAILURE (0x80004005)
aIID={e54f6256-97a7-4947-8a78-10c013ddf4b8} aComponent={HostWrap}
aText={VirtualBox is not currently allowed to access USB devices.  You can
change this by adding your user to the 'vboxusers' group.  Please see the user
manual for a more detailed explanation}, preserve=true aResultDetail=0

-----------

However, the user already was in the vboxusers group!

I also see that while logged in as user, I can't see the contents of
/dev/vboxusb.  The directory is shown as locked, and belonging to vboxusers.

Troubleshooting steps taken so far:

* Remove user from vboxusers, reboot, add user back to vboxusers, reboot.  It
didn't help.

* Uninstall the VirtualBox extension pack, reboot, re-install the extension
pack, reboot.  This also didn't help.

I'm not 100% certain that this problem appeared only with the 20240329
snapshot.    I haven't used the scanners in a few days, might have DUPd to an
earlier snapshot in the meantime.