CVE-2023-20584

Summary

CVE-2023-20584 is a vulnerability affecting IOMMU (Input-Output Memory Management Unit) that mishandles specific special address ranges with invalid device table entries (DTEs). This issue can be exploited by an attacker with privileged access and a compromised hypervisor to induce DTE faults, thereby bypassing RMP (Ring-fencing Memory Protection) checks in SEV-SNP (Secure Enclaves for Secure Nested Paging). The potential consequence of this vulnerability is a loss of guest integrity.

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