CVE-2026-0480

Missing Authentication in AMD SEV Firmware Enables Hypervisor to Forge Requests

Published Nov 10, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
Description
Missing Authentication for Critical Function in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to forge SEV-TIO guest request messages potentially compromising SEV-SNP guest memory integrity and confidentiality.

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 Missing Authentication in AMD SEV Firmware Enables Hypervisor to Forge Requests
Type Values Removed Values Added
First Time appeared Amd
Amd epyc 8005 Series Processors
Amd epyc 9005 Series Processors
Amd epyc Embedded 9005 Series Processors
Vendors & Products Amd
Amd epyc 8005 Series Processors
Amd epyc 9005 Series Processors
Amd epyc Embedded 9005 Series Processors
Type Values Removed Values Added
Title Missing Authentication in AMD SEV Firmware Enables Hypervisor-Controlled SEV‑SNP Memory Compromise
Type Values Removed Values Added
Title Missing Authentication in AMD SEV Firmware Enables Hypervisor-Controlled SEV‑SNP Memory Compromise
Type Values Removed Values Added
Description Missing Authentication for Critical Function in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to forge SEV-TIO guest request messages potentially compromising SEV-SNP guest memory integrity and confidentiality.
Weaknesses CWE-306
References
Metrics cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMD
Published
Updated
Nov 12, 2026, 11:53 PM
Reserved
Dec 6, 2025, 3:11 PM
Status
Awaiting Analysis
Published
Nov 10, 2026, 11:17 PM
Modified
Nov 13, 2026, 12:20 AM