CVE-2026-40669

Published Nov 10, 2026 CVSS 4.0 · 4 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
Title AMD SEV Firmware Off‑by‑One Error Allowing Reverse Map Table Corruption
Type Values Removed Values Added
Title AMD SEV Firmware Off‑by‑One Error Allowing Reverse Map Table Corruption
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
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'}

Subscriptions

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Weaknesses

Sources

Status
PUBLISHED
Assigner
AMD
Published
Updated
Nov 12, 2026, 11:42 PM
Reserved
Apr 14, 2026, 5:04 PM
Status
Awaiting Analysis
Published
Nov 10, 2026, 10:18 PM
Modified
Nov 13, 2026, 12:20 AM