Comment # 9 on bug 1212209 from Larry Finger

The reason it happens with kernel 6.3.6 and not with 6.3.4 is that openSUSE
turned on kernel hardening with the newer kernels. For those of us with older
CPUs, it did not make any difference.

I am reopening this bug entry until Oracle comes up with the fix. The IBT
"feature" in the CPU changes the way that virtualization works, and as the fix
has not yet been found by Oracle with their relatively large group of CPU
experts, I am not even going to try.