In VirtualBox 6.1.8, Oracle added Guest Additions support for the recently released Red Hat Enterprise Linux 8.2, CentOS Linux 8.2, and Oracle Linux 8.2 (only with the Red Hat compatible kernel) distributions. In previous releases, the Guest Additions failed to compile on these distributions. The Guest Additions were also improved with proper support for resizing X11 guests and better handling of multi-monitor configurations, as well as the re-implementations of the ???VBoxClient???checkhostversion??? functionality to check the host version of the VirtualBox client for debugging purposes.