Don't worry: nobody would be incautious enough to hook a safety-critical system up to a general purpose computer, of all things.
That's not even funny.
A lot of these systems are running actually on Windows, in version that aren't supported since years.
Seeing a lot of it going on in healthcare right now, especially healthcare startups. Wonder how soon regulators will step in and start stomping down on it... it usually takes several years to a decade for any federal rule to be issued so startups may make it through long enough to turn the bag over to someone else.