CVE-2023-31356 — Incomplete system memory cleanup in SEV firmware could allow a privileged attack

Incomplete system memory cleanup in SEV firmware could allow a privileged attacker to corrupt guest private memory, potentially resulting in a loss of data integrity.

01What is this vulnerability?

Incomplete system memory cleanup in SEV firmware could allow a privileged attacker to corrupt guest private memory, potentially resulting in a loss of data integrity.

02Affected products

Vendor	Product	Versions
AMD	AMD EPYC™ 7003 Processors	MilanPI 1.0.0.C
AMD	AMD EPYC™ 9004 Processors	GenoaPI 1.0.0.B
AMD	AMD EPYC™ Embedded 7003	"EmbMilanPI-SP3 1.0.0.8"
AMD	AMD EPYC™ Embedded 9004	EmbGenoaPI-SP5 1.0.0.6

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: 2024-08-13T16:54:23.979Z
• Last modified: 2025-02-11T22:48:16.160Z

09References

• www.amd.com — https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html
• www.amd.com — https://www.amd.com/en/resources/product-security/bulletin/amd-sb-5004.html