CVE-2023-31351 — Improper restriction of operations in the IOMMU could allow a malicious hypervis

Improper restriction of operations in the IOMMU could allow a malicious hypervisor to access guest private memory resulting in loss of integrity.

01What is this vulnerability?

Improper restriction of operations in the IOMMU could allow a malicious hypervisor to access guest private memory resulting in loss of integrity.

02Affected products

Vendor	Product	Versions
AMD	AMD EPYC™ 7003 Series Processors	Milan 100C
AMD	AMD EPYC™ 9004 Series Processors	Genoa 100C
AMD	AMD EPYC™ 8004 Series Processors	Genoa 100C
AMD	AMD EPYC™ Embedded 7003 Series Processors	EmbMilanPI-SP3 1.0.0.9
AMD	AMD EPYC™ Embedded 9004 Series Processors	EmbGenoaPI-SP5 1.0.0.7

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2025-09-06T16:59:26.905Z
• Last modified: 2025-09-08T20:03:47.167Z

09References

• www.amd.com — https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.html
• www.amd.com — https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3014.html