I checked the change log in OBS: https://build.opensuse.org/package/view_file/openSUSE:Factory/virtualbox/virtualbox.changes?expand=1 ------------------------------------------------------------------- Wed Jan 20 19:47:15 UTC 2021 - Larry Finger <Larry.Finger@gmail.com> - Version update to 6.1.18 (released January 19 2021) This is a maintenance release. The following items were fixed and/or added: ... ... File "debug_mountsf.patch" is deleted - fixed upstream. Maybe removing that patch was a bit premature; does it really work in all scenarios? How about recent guest add-ons versus a not-so-recent (5.2.42) host VirtualBox?