---
id: "CVE-2024-36309"
page: "https://infrastack.ai/live/CVE-2024-36309"
kind: "vulnerability"
aliases: ["CVE-2024-36309"]
title: "AMD NBIO: missing lock bit lets privileged attacker remap disabled devices"
severity: "medium"
cvss: 4.6
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["amd", "bare-metal", "firmware", "infrastructure", "servers"]
not_affected_if: ["no-privileged-untrusted-users"]
published_at: "2026-11-10T23:17:18+00:00"
first_seen_at: "2026-11-10T23:27:34+00:00"
updated_at: "2026-11-10T23:28:53+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-36309", "first_seen_at": "2026-11-10T23:27:34+00:00"}]
exploit_sources: []
---

# AMD NBIO: missing lock bit lets privileged attacker remap disabled devices

Link for people: https://infrastack.ai/live/CVE-2024-36309 (this .md is for agents)

AMD Northbridge IO (NBIO) lacks lock-bit protection, so a privileged attacker can re-enable an intentionally disabled device and use it in a remapping attack. The sources say this can affect data confidentiality, integrity, or availability.

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

## Timeline

- 2026-11-10T23:27:34+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2024-36309

## From the sources

Missing Lock Bit Protection in the Northbridge IO (NBIO) could allow a privileged attacker to use an intentionally disabled device as part of a remapping attack potentially impacting data confidentiality, integrity, or availability.

---

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