My understanding isn't especially deep, but I believe AMD prevents access to unloaded pages that the code doesn't have permission to access, even for speculativ

My understanding isn't especially deep, but I believe AMD prevents access to unloaded pages that the code doesn't have permission to access, even for speculative access. Their specific quote is: "AMD processors are not subject to the types of attacks that the kernel page table isolation feature protects against. The AMD microarchitecture does not allow memory references, including speculative references, that access higher privileged data when running in a lesser privileged mode when that access would result in a page fault."