What is CVE-2023-20529?

CVE-2023-20529 is a high-severity vulnerability in AMD 2nd Gen Epyc, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2023-01-11.

How severe is CVE-2023-20529?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in AMD 2nd Gen Epyc

CVE-2023-20529

Insufficient bound checks in the SMU may allow an attacker to update the from/to address space to an invalid value potentially resulting in a denial of service.

Vulnerability class: Buffer Overflow

Published 2023-01-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (50.4th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2023-20529?: CVE-2023-20529 is a high-severity vulnerability in AMD 2nd Gen Epyc, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2023-01-11.
How severe is CVE-2023-20529?: High severity. CVSS v3 base score is 7.5 out of 10.