What is CVE-2023-31356?

CVE-2023-31356 is a medium-severity vulnerability in AMD Epyc™ 7003 Processors, classified under Incomplete Cleanup. CVSS score: 4.4/10. Published 2024-08-13.

How severe is CVE-2023-31356?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Is CVE-2023-31356 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in AMD Epyc™ 7003 Processors

CVE-2023-31356

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.

Published 2024-08-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.002 (11.1th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

AMD Epyc™ 7003 Processors — versions MilanPI 1.0.0.C
AMD Epyc™ 9004 Processors — versions GenoaPI 1.0.0.B
AMD Epyc™ Embedded 7003 — versions "EmbMilanPI-SP3 1.0.0.8"
AMD Epyc™ Embedded 9004 — versions EmbGenoaPI-SP5 1.0.0.6

Weakness classification (CWE)

CWE-459 — Incomplete Cleanup

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

Frequently asked questions

What is CVE-2023-31356?: CVE-2023-31356 is a medium-severity vulnerability in AMD Epyc™ 7003 Processors, classified under Incomplete Cleanup. CVSS score: 4.4/10. Published 2024-08-13.
How severe is CVE-2023-31356?: Medium severity. CVSS v3 base score is 4.4 out of 10.
Is CVE-2023-31356 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.