This is clearly something where a regulatory agency that can and will apply penalties to manufacturers that do not fix bugs that are physically possible to fix

This is clearly something where a regulatory agency that can and will apply penalties to manufacturers that do not fix bugs that are physically possible to fix without ill effect in a timely manner is appropriate. You simply report to that agency. These problems are serious enough that failing fast and hard is not a good way to go about it. This is software meets physical reality. In software land, we've developed radically different approaches to engineering problems because of the incredibly cheap costs. This is one place where we have to borrow from other disciplines that have more experience with safety issues.