I have a Lenovo ThinkPad T430 running Red Hat Enterprise Linux 6.7 with kernel 2.6.32-573.8.1.el6.x86_64. This is a work computer and my corporate policy states that I must keep my operating system up to date, so I recently installed the aforementioned kernel version via
yum upgrade (the upgrade also pulled over 100 updated packages), restarted, and now I was unable to start my VMs. Attempting to start one from
virt-manager or with
virsh --connect qemu:///system list throws an error message that says
error: internal error Cannot parse sensitivity level in s0.
I eventually managed to fix this error as follows in the answer: