---
id: "CVE-2024-21963"
page: "https://infrastack.ai/live/CVE-2024-21963"
kind: "vulnerability"
aliases: ["CVE-2024-21963"]
title: "IOMMU out-of-bounds read lets a malicious guest crash the host"
severity: "medium"
cvss: 6.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["hypervisor", "infrastructure", "iommu", "virtualization"]
not_affected_if: ["no-untrusted-guests"]
published_at: "2026-11-12T20:18:09+00:00"
first_seen_at: "2026-11-12T20:40:22+00:00"
updated_at: "2026-11-12T20:42:20+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-21963", "first_seen_at": "2026-11-12T20:40:22+00:00"}]
exploit_sources: []
---

# IOMMU out-of-bounds read lets a malicious guest crash the host

Link for people: https://infrastack.ai/live/CVE-2024-21963 (this .md is for agents)

An out-of-bounds read in the IOMMU lets a malicious guest virtual machine corrupt hypervisor memory pages. The result can be a host crash, which takes down availability for everything running on that machine.

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

## Timeline

- 2026-11-12T20:40:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2024-21963

## From the sources

An out-of-bounds read vulnerability in the IOMMU could allow a malicious guest to corrupt hypervisor (HV) pages and potentially cause a host crash leading to loss of availability.

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