As for liability, I don't think you can be liable in court if you didn't plan for something that wasn't known at the time and isn't trivial. Engineering brakes

As for liability, I don't think you can be liable in court if you didn't plan for something that wasn't known at the time and isn't trivial. Engineering brakes that work reliably over months and years of use isn't trivial. Process isolation and kernel security issues have been known for decades and have been fundamental design requirements for decades.