CVE-2026-40668

Published Nov 10, 2026 CWE-290

Description

Authentication bypass by spoofing in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to request attestation reports for VMPL 0.

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Weakness Type (CWE)

CWE-290 CWE-290

References

Other References

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3038.html

Frequently Asked Questions

What is CVE-2026-40668? +

Authentication bypass by spoofing in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to request attestation reports for VMPL 0.

How do I check if I'm vulnerable to CVE-2026-40668? +

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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