CVE-2026-40669 | BDVDB-2026-403072 Detail

AMDAMD EPYC™ 9004 Series Processors

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.

Impact#

Per CVSS v4.0: confidentiality impact none, integrity impact none, availability impact none. Attack vector: local.

Weaknesses#

CWE-193 Off-by-one Error

References#

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

Exploit#

No public exploit known

History#

Version 12026-11-10Record published in the CVE List.

Published

Published: 2026-11-10
Last modified: 2026-11-10

Vendor information

Vendor: AMD
Product: AMD EPYC™ 9004 Series Processors

All AMD vulnerabilities

Score

4.0 Medium

EPSS

Not available

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
Not stated
Fixed
GenoaPI_1.0.0.J

Scoring System

CVSS v4.0

4.0 Medium

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

Metric breakdown
Attack Vector	Local
Attack Complexity	Low
Attack Requirements	Present
Privileges Required	High
User Interaction	None
Vulnerable System Confidentiality	None
Vulnerable System Integrity	None
Vulnerable System Availability	None
Subsequent System Confidentiality	None
Subsequent System Integrity	High
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).