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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- None
What each source reports
CVE List Score used
Authentication bypass by spoofing in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to request attestation reports for VMPL 0.
- Record
CVE-2026-40668- CVSS 4.0
- 4.6 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N - Weakness
- CWE-290
- Updated
- 2026-11-10
EUVDEUVD-2026-123042
Authentication bypass by spoofing in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to request attestation reports for VMPL 0.
- Record
EUVD-2026-123042- CVSS 4.0
- 4.6 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N - Updated
- 2026-11-10
Affected products
- amd epyc™ 7003 series processors
- amd epyc™ 8004 series processors
- amd epyc™ 8005 series processors
- amd epyc™ 9004 series processors
- amd epyc™ 9005 series processors
- amd epyc™ embedded 7003 series processors
- amd epyc™ embedded 8004 series processors
- amd epyc™ embedded 9004 series processors (formerly codenamed "genoa")
- amd epyc™ embedded 9004 series processors (formerly codenamed "bergamo")
- amd epyc™ embedded 9005 series processors
History
| Recorded | Changed | Sources |
|---|---|---|
| cwes, severity | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-40668 is a medium vulnerability (CVSS 4.6) in Amd Epyc™ 7003 Series Processors, published November 10, 2026. No source lists public exploit code. No source names a fixed version.