Is CVE-2024-21963 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2024-21963 being exploited in the wild.

How severe is CVE-2024-21963?

Informational severity, published 12 November 2026.

Is there a fix for CVE-2024-21963?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2024-21963 attacked?

It is attacked over the network, in device firmware.

Am I affected by CVE-2024-21963?

Check whether you run Amd IOMMU. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2024-21963: AMD IOMMU out-of-bounds read in hypervisor

CVE-2024-21963 · Severity: info · Published 2026-11-12

A vulnerability in AMD's IOMMU (Input/Output Memory Management Unit) hardware could allow a malicious virtual machine to read memory outside intended bounds and corrupt the host hypervisor's internal pages. An attacker could exploit this to crash the host system and disrupt all running virtual machines on that hardware.

Vendors: Amd.

Quick answers

Is CVE-2024-21963 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2024-21963 being exploited in the wild.
How severe is CVE-2024-21963?: Informational severity, published 12 November 2026.
Which products and versions are affected?: AMD IOMMU.
Is there a fix for CVE-2024-21963?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2024-21963 attacked?: It is attacked over the network, in device firmware.
Am I affected by CVE-2024-21963?: Check whether you run Amd IOMMU. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An out-of-bounds read flaw in the IOMMU allows a guest VM to access and corrupt hypervisor memory pages through a malicious DMA request. The vulnerability requires the attacker to control a guest VM on the target system and does not require privilege escalation. Exploitation results in host denial of service and potential data corruption of the hypervisor state.

Affected products

AMD IOMMU

Timeline

2026-11: disclosed

References

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