I have an Ubuntu 24.4 Guest running on an Oracle 9 Host, with Guest Additions loaded. It seems to mostly work; I can access a Shared folder. However, on install it complained that it could not load kernel modules, and the vboxadd.service is not running / failed; it gives an error on boot and shutdown. I tried loading linux-headers-generic and several reinstalls, didn't help.
I have tried a multitude of things to try to correct it, and if I uninstall it from opt/Virtualbox_GA I can't get it to reinstall (good thing for snapshots).
This is Host version 7.014 r161095 (Qt5.15.9)