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Vulnerability record · CVE-2023-20555 · published 8 August 2023

CVE-2023-20555: Amd ryzen 3 3300 firmware out-of-bounds write vulnerability

AAmd · Ryzen 3 3300 Firmware

Insufficient input validation in CpmDisplayFeatureSmm may allow an attacker to corrupt SMM memory by overwriting an arbitrary bit in an attacker-controlled pointer potentially leading to arbitrary code execution in SMM.

7.8 CVSS 3.1 High EPSS 0.32% · top 77.0% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
119Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Insufficient input validation in CpmDisplayFeatureSmm may allow an attacker to corrupt SMM memory by overwriting an arbitrary bit in an attacker-controlled pointer potentially leading to arbitrary code execution in SMM.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

119 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4003 Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4003 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-20555), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.