The vmx_set_msr function in arch/x86/kvm/vmx.c in the VMX
implementation in the KVM subsystem in the Linux kernel before
18.104.22.168 on the i386 platform allows guest OS users to cause a denial
of service (OOPS) by setting the EFER_LME (aka "Long mode enable")
bit in the Extended Feature Enable Register (EFER) model-specific
register, which is specific to the x86_64 platform.
security team, please try to make note of this. All bugs related to the "kernel" of 'hardened' should be assigned to 'hardened-kernel' vs 'hardened'
Thanks in advance.