---
id: "CVE-2026-0480"
page: "https://infrastack.ai/live/CVE-2026-0480"
kind: "vulnerability"
aliases: ["CVE-2026-0480"]
title: "AMD SEV firmware: missing authentication lets a hypervisor forge guest messages"
severity: "medium"
cvss: 6.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["amd", "confidential-computing", "hypervisor", "infrastructure", "linux-kvm", "sev-snp"]
not_affected_if: ["no-sev-snp-guests", "no-sev-tio"]
published_at: "2026-11-10T23:17:19+00:00"
first_seen_at: "2026-11-10T23:27:36+00:00"
updated_at: "2026-11-10T23:28:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0480", "first_seen_at": "2026-11-10T23:27:36+00:00"}]
exploit_sources: []
---

# AMD SEV firmware: missing authentication lets a hypervisor forge guest messages

Link for people: https://infrastack.ai/live/CVE-2026-0480 (this .md is for agents)

AMD Secure Encrypted Virtualization (SEV) firmware does not authenticate a critical function, so a malicious hypervisor can forge SEV-TIO guest request messages. This could compromise the memory integrity and confidentiality of SEV-SNP guests.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-10T23:27:36+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-0480

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_