Comment 4 for bug 1903864

Hello Alex. It's ok, I was unsure with the security classification. The attackers could cross the boundaries as a direct result of the user's inability to encrypt disc drives using BitLocker, so ... it isn't a "hidden" security problem, but it still affects the security at certain level.
Yesterday I tried to rebuild qemu 5 from Ubuntu 20.10 against 20.04 and the issue is present even in the newer version.