Out-of-Bounds Read of Device Table by IOMMU
Summary
Improper validation of device table accesses in the IOMMU may allow an out-of-bounds read of a Device Table Entry (DTE), potentially resulting in loss of system integrity or denial of service.
This issue does not manifest when the device table is configured to its maximum supported size.
CVE Details
Refer to Glossary for explanation of terms
CVE |
CVE Description |
CVSS Score |
CVE-2024-21963 |
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. |
6.0 CWE-125: Out-of-bounds Read |
Specific CVSS scores may change subject to your implementation. We encourage you to calculate CVSS scores independently for your system.
Affected Products and Mitigation
Mitigations will be upstreamed to the Linux Kernel on the target dates listed below.
*Note: Products believed to not be affected by the listed CVEs are not included.AMD EPYC™ Series Processors
AMD EPYC™ Series Processors
Product |
CVE ID |
Mitigation |
Mitigation Release Date |
OS Update |
AMD EPYC™ 4004 Series Processors |
CVE-2024-21963 |
ComboAM5PI 1.2.0.3g |
2025-08-28 |
No |
AMD EPYC™ 4005 Series Processors |
CVE-2024-21963 |
ComboAM5PI 1.2.0.3g |
2025-08-28 |
No |
AMD EPYC™ 7001 Series Processors |
CVE-2024-21963 |
Linux kernel upstream |
Target release planned for Nov'26 |
Yes |
AMD EPYC™ 7002 Series Processors |
CVE-2024-21963 |
Linux kernel upstream |
Target release planned for Nov'26 |
Yes |
AMD EPYC™ 7003 Series Processors |
CVE-2024-21963 |
Linux kernel upstream |
Target release planned for Nov'26 |
Yes |
AMD EPYC™ 8004 Series Processors |
CVE-2024-21963 |
Linux kernel upstream |
Target release planned for Nov'26 |
Yes |
AMD EPYC™ 8005 Series Processors |
CVE-2024-21963 |
Linux kernel upstream |
Target release planned for Nov'26 |
Yes |
AMD EPYC™ 9004 Series Processors |
CVE-2024-21963 |
Linux kernel upstream |
Target release planned for Nov'26 |
Yes |
AMD EPYC™ 9005 Series Processors |
CVE-2024-21963 |
Linux kernel upstream |
Target release planned for Nov'26 |
Yes |
AMD EPYC™ Embedded Series Processors
Product |
CVE ID |
Mitigation |
Mitigation Release Date |
AMD EPYC™ Embedded 7003 Series Processors |
CVE-2024-21963 |
Linux kernel upstream |
Target release planned for Nov'26 |
AMD EPYC™ Embedded 9004 Series Processors |
CVE-2024-21963 |
Linux kernel upstream |
Target release planned for Nov'26 |
Acknowledgement
Reported internally
Revisions
| Revision Date | Description |
| 2026-11-10 | Initial version |
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