CVE-2025-54506

Published Nov 10, 2026 CVSS 4.0 · 4 Medium EPSS < 1% KEV · Not listed
Description
A time-of-check to time-of-use (TOCTOU) race condition in the AMD SEV Secure Encrypted Virtualization (SEV) firmware could allow an attacker with administrative privileges to bypass security checks on scatter lists, potentially resulting in loss of guest integrity.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title AMD SEV Firmware TOCTOU Race Enables Guest Integrity Loss
Type Values Removed Values Added
First Time appeared Amd
Amd epyc 9005 Series Processors
Amd epyc Embedded 9005 Series Processors
Vendors & Products Amd
Amd epyc 9005 Series Processors
Amd epyc Embedded 9005 Series Processors
Type Values Removed Values Added
Title AMD SEV Firmware TOCTOU Race Enables Guest Integrity Loss
Type Values Removed Values Added
Title TOCTOU race in AMD SEV enables security check bypass, risking guest integrity
Type Values Removed Values Added
Title TOCTOU race in AMD SEV enables security check bypass, risking guest integrity
Type Values Removed Values Added
Description A time-of-check to time-of-use (TOCTOU) race condition in the AMD SEV Secure Encrypted Virtualization (SEV) firmware could allow an attacker with administrative privileges to bypass security checks on scatter lists, potentially resulting in loss of guest integrity.
Weaknesses CWE-367
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMD
Published
Updated
Nov 12, 2026, 11:37 PM
Reserved
Jul 23, 2025, 3:01 PM
Status
Awaiting Analysis
Published
Nov 10, 2026, 10:17 PM
Modified
Nov 13, 2026, 12:20 AM