CVE-2021-26373

Name: CVE-2021-26373
Creator: NVD / NIST
Published: 2022-05-11T17:15:08.587+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.21%

Last modified Jun 17, 2026

CVE-2021-26373 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Insufficient bound checks in the System Management Unit (SMU) may result in a system voltage malfunction that could result in denial of resources and/or possibly denial of service.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

Insufficient bound checks in the System Management Unit (SMU) may result in a system voltage malfunction that could result in denial of resources and/or possibly denial of service.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.21%

11.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Amd	Epyc 7232p Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7302p Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7402p Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7502p Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7702p Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7252 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7262 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7272 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7282 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7302 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7352 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7402 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7452 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7502 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7532 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7542 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7552 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7642 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7662 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7702 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7742 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7f32 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7f52 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7f72 Firmware	< romepi-sp3_1.0.0.d
Amd	Epyc 7313p Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7443p Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7543p Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7713p Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7773x Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7763 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7713 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7663 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7643 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7573x Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 75f3 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7513 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7473x Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7453 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 74f3 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7413 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 73f3 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7373x Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 7343 Firmware	< milanpi-sp3_1.0.0.7
Amd	Epyc 72f3 Firmware	< milanpi-sp3_1.0.0.7
Amd	Ryzen 7 2700x Firmware	< comboam4_v2_pi_1.2.0.6c
Amd	Ryzen 7 2700x Firmware	< comboam4pi_1.0.0.8
Amd	Ryzen 7 2700 Firmware	< comboam4pi_1.0.0.8
Amd	Ryzen 7 2700 Firmware	< comboam4_v2_pi_1.2.0.6c
Amd	Ryzen 5 2600x Firmware	< comboam4_v2_pi_1.2.0.6c
Amd	Ryzen 5 2600x Firmware	< comboam4pi_1.0.0.8

Showing 50 of 133 affected configurations. See NVD for the full list.

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028Vendor Advisory

Timeline

Published: May 11, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26373?

Insufficient bound checks in the System Management Unit (SMU) may result in a system voltage malfunction that could result in denial of resources and/or possibly denial of service.

How severe is CVE-2021-26373?

CVE-2021-26373 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26373?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26373?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST