This is a maintenance release. The following items were fixed and/or added:
Known issue: VMs having more than one vCPU configured will not work properly on macOS Catalina due to an unknown memory corruption issue. Either lower the number of vCPUs to 1 or upgrade to BigSur or later where the issue does not occur
Main: Fixed issue when VBoxSVC could become unresponsive if Extension Pack was not installed (bug #21167)
macOS hosts: Added workaround for a bug in the Hypervisor framework on Catalina causing VERR_NEM_MAP_PAGES_FAILED errors when starting a VM. (bug #21128)
macOS hosts: Re-introduced support for internal networking, this is considered a bit experimental still
macOS hosts: Fixed VM crash when the guest tries to access a microphone or webcam
Windows host: Shared Clipboard: Fixed issue when only 4Kb of host clipboard buffer was accessible to guest (bug #21149)
Linux Guest Additions: Introduced initial support for kernel 6.1
Linux Guest Additions: Fixed issue when VBoxClient seamless service caused a crash of some X11 applications (bug #21132)
Windows hosts: GUI: Fixed missing Qt libraries for vista style and sql driver (bug #21155)
GUI: Fixed a glitch in the log viewer which was causing wrong log file to be saved (bug #21156)
Oracle VirtualBox 7.0.2 
