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SEV-SNP RMP Initialization Vulnerability , Oct. 13, 2025 (2025-10-13)
(AMD-SB-3020)

Summary:

Researchers from ETHz reported that a malicious hypervisor could corrupt the Reverse Map Table (RMP) during Secure Nested Paging (SNP) initialization.

AMD reproduced the issue and determined it is due to a race condition that can occur while the AMD Secure Processor (ASP) is initializing the RMP. This attack could allow a malicious hypervisor to manipulate the initial RMP content, potentially resulting in loss of SEV-SNP guest memory integrity. AMD has released mitigations for this vulnerability.

Affected Platforms and BIOS version numbers that contain the fix:

Product BIOS Version with Fix
AMD SP5 Genoa / Turin
S8050 TBD
FT65TB8050TBD
GC68AB8056TBD
GC68CB8056TBD
GC68CB8056 (TU)TBD
TS70AB8056TBD
TS70AB8056 (TU)TBD
TD76B8058TBD
TS70B8056TBD
TS70B8056 (TU)TBD
TN85B8261TBD
AMD SP6 Siena
S8040TBD
GC73AB8046TBD
AMD AM5 Raphael
S8016N
GX40B8016N
HG68B8016N




 

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