CVE-2026-40670 - Vulnerability Details - OpenCVE

Improper check for unusual or exceptional conditions in AMD Secure Encrypted Virtualization - Secure Nested Paging (SEV-SNP) could allow a privileged attacker to potentially overlap MMIO regions with DRAM regions resulting in loss of integrity.

Attack Vector Local

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact High

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

No data.

No data.

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No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

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

History

Tue, 10 Nov 2026 22:15:00 +0000

Type	Values Removed	Values Added
Description		Improper check for unusual or exceptional conditions in AMD Secure Encrypted Virtualization - Secure Nested Paging (SEV-SNP) could allow a privileged attacker to potentially overlap MMIO regions with DRAM regions resulting in loss of integrity.
Weaknesses		CWE-754
References		https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3038.html
Metrics		cvssV4_0 `{'score': 5.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: AMD

Published: 2026-11-10T22:10:18.169Z

Updated: 2026-11-10T22:10:18.169Z

Reserved: 2026-04-14T17:04:40.591Z

Link: CVE-2026-40670

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-11-10T22:18:33.047

Modified: 2026-11-10T22:18:33.047

Link: CVE-2026-40670

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-754

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