Having page tables (and other security features) isn't mutually exclusive with being horribly insecure in practice. CPUs have certainly had their fair share of vulnerabilities exposed within even just the past few years.
I'll freely admit that I'm going off of what other people have told me. I don't do GPU driver development (or other hardware or the kernel for that matter). But the message I've encountered has been consistent in this regard. If nothing else, ask yourself why google would go to the amount of trouble that they have to develop various GPU sandboxing layers for chromeos apps.
Having page tables (and other security features) isn't mutually exclusive with being horribly insecure in practice. CPUs have certainly had their fair share of vulnerabilities exposed within even just the past few years.
I'll freely admit that I'm going off of what other people have told me. I don't do GPU driver development (or other hardware or the kernel for that matter). But the message I've encountered has been consistent in this regard. If nothing else, ask yourself why google would go to the amount of trouble that they have to develop various GPU sandboxing layers for chromeos apps.