CVE-2025-29940

Published Nov 10, 2026 CWE-283

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.

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Weakness Type (CWE)

CWE-283 CWE-283

References

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 do I check if I'm vulnerable to CVE-2025-29940? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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