CVE-2025-29940

MEDIUMCVSS 5.9/10

Last modified

CVE-2025-29940 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Unverified ownership in Secure Encrypted Virtualization (SEV) firmware could allow a privileged attacker with access to a malicious hypervisor to overwrite guest memory if segmented Reverse Map Table (RMP) is enabled potentially resulting in loss of guest data integrity..

Description

Unverified ownership in Secure Encrypted Virtualization (SEV) firmware could allow a privileged attacker with access to a malicious hypervisor to overwrite guest memory if segmented Reverse Map Table (RMP) is enabled potentially resulting in loss of guest data integrity.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
AMDAMD EPYC™ 9005 Series ProcessorsAll versions
AMDAMD EPYC™ Embedded 9005 Series ProcessorsAll versions

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2025-29940?
Unverified ownership in Secure Encrypted Virtualization (SEV) firmware could allow a privileged attacker with access to a malicious hypervisor to overwrite guest memory if segmented Reverse Map Table (RMP) is enabled potentially resulting in loss of guest data integrity.
How severe is CVE-2025-29940?
CVE-2025-29940 has a CVSS score of 5.9/10 (MEDIUM severity).
How do I fix CVE-2025-29940?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST