CVE-2026-40669 - Vulnerability Details - OpenCVE

An off-by-one error in AMD Secure Encrypted Virtualization (SEV) firmware could allow an attacker with hypervisor access to corrupt the Reverse Map Table (RMP) table, potentially resulting in loss of guest memory integrity.

Attack Vector Local

Attack Complexity Low

Privileges Required High

Attack Requirements Present

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.

No data.

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		An off-by-one error in AMD Secure Encrypted Virtualization (SEV) firmware could allow an attacker with hypervisor access to corrupt the Reverse Map Table (RMP) table, potentially resulting in loss of guest memory integrity.
Weaknesses		CWE-193
References		https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3038.html
Metrics		cvssV4_0 `{'score': 4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/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: 2026-11-10T22:10:48.420Z

Updated: 2026-11-10T22:10:48.420Z

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

Link: CVE-2026-40669

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-11-10T22:18:32.910

Modified: 2026-11-10T22:18:32.910

Link: CVE-2026-40669

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-193

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