virtualbox[.]org/wiki/Downloads
While there are several fixes for Linux hosts, the biggest Windows related change is the update to the newer secure boot certificate is now supposed to work. After installing the updated version & extensions the most I can say is Maybe... I ran the following test published by Microsoft:
To test, run each of the following commands separately from an administrator PowerShell prompt:reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Secureboot /v AvailableUpdates /t REG_DWORD /d 0x5944 /f
Start-ScheduledTask -TaskName "\Microsoft\Windows\PI\Secure-Boot-Update"
Manually reboot the system when the AvailableUpdates becomes 0x4100
Start-ScheduledTask -TaskName "\Microsoft\Windows\PI\Secure-Boot-Update"
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Then to verify, also using PShell
([System.Text.Encoding]::ASCII.GetString((Get-SecureBootUEFI db).bytes) -match 'Windows UEFI CA 2023')
The verification step showed the new certificate was now present, but the registry keys that keep track of this listed several errors, e.g., "Firmware_MissingKEKInPackage". That said, & FWIW, I'm not as concerned since Microsoft published that the old secure boot certificate would continue to work. Having the newer certificate is a bonus, but not having it doesn't break anything.