Quick answers
- Is CVE-2024-21954 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2024-21954 being exploited in the wild.
- How severe is CVE-2024-21954?
- Informational severity, published 12 November 2026.
- Which products and versions are affected?
- AMD IOMMU firmware.
- Is there a fix for CVE-2024-21954?
- 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-2024-21954 attacked?
- It is attacked with local access or from the adjacent network, in device firmware.
- Am I affected by CVE-2024-21954?
- Check whether you run Amd IOMMU firmware. 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 improper exception handling issue in AMD IOMMU allows invalidate commands to be sent to PCIe devices lacking Address Translation Cache (ATC) support. The vulnerability occurs when an invalidate command is triggered without proper validation of device capabilities. A local or adjacent attacker with ability to trigger IOMMU operations could cause a denial of service condition.
Affected products
- AMD IOMMU firmware
Timeline
- 2026-11-12: disclosed