Correct, but this liability would (most probably) be based on showing some kind of negligence.
> so lying about it isn't really the worst option if there's even a small chance it avoids the issue
Deliberately lying about it would be fraud. Getting caught with that would dramatically increase the liability.
Since you used the VW example: do you really think it would have cost VW something around the order of $30bn if some foreign power had manipulated their emissions test without their knowledge? Or that executives would have been arrested?
> After seeing what VW did with emissions, I wouldn't say any huge corporate cover-up
This isn't a cover-up, though. This is Apple expressly addressing the issue, and categorically denying every part of it. To everyone, up to and including Congress, no less.