---
id: "CVE-2026-28248"
page: "https://infrastack.ai/live/CVE-2026-28248"
kind: "vulnerability"
aliases: ["CVE-2026-28248"]
title: "AMD SEV firmware: malicious hypervisor can launch guests with forged attestation"
severity: "medium"
cvss: 5.9
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["amd", "confidential-computing", "hypervisor", "infrastructure", "sev"]
not_affected_if: ["no-amd-sev", "non-confidential-guests"]
published_at: "2026-11-10T22:18:32+00:00"
first_seen_at: "2026-11-10T22:27:30+00:00"
updated_at: "2026-11-10T22:29:21+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28248", "first_seen_at": "2026-11-10T22:27:30+00:00"}]
exploit_sources: []
---

# AMD SEV firmware: malicious hypervisor can launch guests with forged attestation

Link for people: https://infrastack.ai/live/CVE-2026-28248 (this .md is for agents)

AMD Secure Encrypted Virtualization firmware fails to enforce a required workflow, so a malicious hypervisor can launch a guest whose attestation report carries an ID key digest that does not match the guest's measurement. The result is loss of integrity for the guest.

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

## Timeline

- 2026-11-10T22:27:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-28248

## From the sources

Improper enforcement of behavioral workflow in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to potentially launch a guest whose attestation report contains an ID key digest for an ID block that doesn't match the guest's measurement resulting in loss of integrity.

---

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