# CVE-2025-54506: CVE-2025-54506

Status: published. Published: 2026-11-10. Updated: 2026-11-13.

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 remediation reported in collected sources

## Affected products and versions

- AMD / AMD EPYC™ 9005 Series Processors: TurinPI_1.0.0.A (unaffected). Source: CNA: AMD
- AMD / AMD EPYC™ Embedded 9005 Series Processors: EmbeddedTurinPI_SP5_1004 (unaffected). Source: CNA: AMD

## Severity and prioritization

- CVSS 4.0: 4 (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; source: CNA: AMD

- CVSS 4.0: 4 (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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: psirt@amd.com

- CISA KEV: No listing in collected sources

- EPSS: 0.13% as of 2026-11-12; percentile 2.79%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-367

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3037.html (CNA: AMD)

- https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3037.html (psirt@amd.com)

## Provenance

- CNA: AMD: https://www.cve.org/CVERecord?id=CVE-2025-54506; retrieved 2026-11-13; source updated 2026-11-12

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-54506; retrieved 2026-11-14; source updated 2026-11-13

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-54506; retrieved 2026-11-13; source updated Not reported

Revision: c46419147a1ba71176dc831046ecfdf6b892fb0902e053a786b4e418c6053816

Canonical: https://y2.dev/cve/CVE-2025-54506

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