AMD IOMMU Vulnerability in SEV-SNP Allowing Privileged Attackers to Bypass RMP Checks and Induce PTE Faults

A vulnerability has been identified in the handling of invalid nested page table entries within the IOMMU, which may allow a privileged attacker to cause page table entry (PTE) faults. This could bypass RMP checks in SEV-SNP, potentially compromising the integrity of guest memory.

Impact

Exploitation of this vulnerability could lead to a loss of integrity in guest memory, allowing for unauthorized modifications or access to memory contents.