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Vulnerability record · CVE-2021-26336 · published 16 November 2021

CVE-2021-26336: Amd epyc 7003 firmware memory buffer overflow vulnerability

AAmd · Epyc 7003 Firmware

Insufficient bounds checking in System Management Unit (SMU) may cause invalid memory accesses/updates that could result in SMU hang and subsequent failure to service any further requests from other components.

5.5 CVSS 3.1 Medium EPSS 0.22% · top 88.9% CWE-119 · Memory buffer overflow
5.5CVSS 3.1 base score, v2 4.9
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
95Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Insufficient bounds checking in System Management Unit (SMU) may cause invalid memory accesses/updates that could result in SMU hang and subsequent failure to service any further requests from other components.

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

Affected products

95 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-1027 Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027 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-2021-26336), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.