---
id: "CVE-2025-54503"
page: "https://infrastack.ai/live/CVE-2025-54503"
kind: "vulnerability"
aliases: ["CVE-2025-54503"]
title: "AMD SEV firmware: overlapping memory ranges let a privileged attacker corrupt integrity"
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-sev", "non-amd"]
published_at: "2026-11-10T22:17:46+00:00"
first_seen_at: "2026-11-10T22:27:22+00:00"
updated_at: "2026-11-10T22:30:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54503", "first_seen_at": "2026-11-10T22:27:22+00:00"}]
exploit_sources: []
---

# AMD SEV firmware: overlapping memory ranges let a privileged attacker corrupt integrity

Link for people: https://infrastack.ai/live/CVE-2025-54503 (this .md is for agents)

AMD's Secure Encrypted Virtualization (SEV) firmware mishandles overlapping protected memory ranges, so a privileged attacker can misconfigure the RMP (Reverse Map Table). The sources say this can lead to loss of integrity.

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

## Timeline

- 2026-11-10T22:27:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2025-54503

## From the sources

Improper handling of overlap between protected memory ranges in the Secure Encrypted Virtualization (SEV) firmware could allow a privileged attacker to cause misconfigurations in the RMP potentially 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_