Improper Access Control in AMD Secure Encrypted Virtualization Firmware
CVE-2026-28247

5.9MEDIUM

Key Information:

Vendor

Amd
Status
Amd Epyc™ 9004 Series Processors
Amd Epyc™ 7003 Series Processors
Amd Epyc™ 9005 Series Processors
Amd Epyc™ 8004 Series Processors
Vendor
CVE Published:
10 November 2026

What is CVE-2026-28247?

The vulnerability arises from inadequate access control mechanisms in AMD's Secure Encrypted Virtualization (SEV) firmware. This flaw enables a malicious hypervisor to manipulate the encryption bits of guest context pages. As a result, it poses a risk to the integrity of the virtualized environment, potentially allowing unauthorized alterations to sensitive data and configurations within the affected system.

Affected Version(s)

AMD EPYC™ 7003 Series Processors MilanPI-SP3_1.0.0.K

AMD EPYC™ 8004 Series Processors GenoaPI_1.0.0.J

AMD EPYC™ 8005 Series Processors TurinPI_1.0.0.B

References

https://www.amd.com/en/resources/product-security/bulleti...

CVSS V4

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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