CVE-2023-20528

Name: CVE-2023-20528
Creator: NVD / NIST
Published: 2023-01-11T08:15:13.847+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.4/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2023-20528 is a low-severity vulnerability rated 2.4/10 on the CVSS scale. Insufficient input validation in the SMU may allow a physical attacker to exfiltrate SMU memory contents over the I2C bus potentially leading to a loss of confidentiality. . EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

Insufficient input validation in the SMU may allow a physical attacker to exfiltrate SMU memory contents over the I2C bus potentially leading to a loss of confidentiality.

Metrics

CVSS 3.1

2.4/10

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

EPSS Probability

0.24%

15.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Amd	Epyc 7h12 Firmware	< romepi_1.0.0.c
Amd	Epyc 7f72 Firmware	< romepi_1.0.0.c
Amd	Epyc 7f52 Firmware	< romepi_1.0.0.c
Amd	Epyc 7f32 Firmware	< romepi_1.0.0.c
Amd	Epyc 7742 Firmware	< romepi_1.0.0.c
Amd	Epyc 7702p Firmware	< romepi_1.0.0.c
Amd	Epyc 7702 Firmware	< romepi_1.0.0.c
Amd	Epyc 7662 Firmware	< romepi_1.0.0.c
Amd	Epyc 7642 Firmware	< romepi_1.0.0.c
Amd	Epyc 7552 Firmware	< romepi_1.0.0.c
Amd	Epyc 7542 Firmware	< romepi_1.0.0.c
Amd	Epyc 7532 Firmware	< romepi_1.0.0.c
Amd	Epyc 7502p Firmware	< romepi_1.0.0.c
Amd	Epyc 7502 Firmware	< romepi_1.0.0.c
Amd	Epyc 7452 Firmware	< romepi_1.0.0.c
Amd	Epyc 7402 Firmware	< romepi_1.0.0.c
Amd	Epyc 7402p Firmware	< romepi_1.0.0.c
Amd	Epyc 7352 Firmware	< romepi_1.0.0.c
Amd	Epyc 7302p Firmware	< romepi_1.0.0.c
Amd	Epyc 7302 Firmware	< romepi_1.0.0.c
Amd	Epyc 7282 Firmware	< romepi_1.0.0.c
Amd	Epyc 7272 Firmware	< romepi_1.0.0.c
Amd	Epyc 7262 Firmware	< romepi_1.0.0.c
Amd	Epyc 7252 Firmware	< romepi_1.0.0.c
Amd	Epyc 7232p Firmware	< romepi_1.0.0.c
Amd	Epyc 7002 Firmware	< romepi_1.0.0.c
Amd	Epyc 7003 Firmware	< milanpi_1.0.0.5
Amd	Epyc 72f3 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7313 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7313p Firmware	< milanpi_1.0.0.5
Amd	Epyc 7343 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7373x Firmware	< milanpi_1.0.0.5
Amd	Epyc 73f3 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7413 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7443 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7443p Firmware	< milanpi_1.0.0.5
Amd	Epyc 7453 Firmware	< milanpi_1.0.0.5
Amd	Epyc 74f3 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7513 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7543 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7543p Firmware	< milanpi_1.0.0.5
Amd	Epyc 7573x Firmware	< milanpi_1.0.0.5
Amd	Epyc 75f3 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7643 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7663 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7713 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7713p Firmware	< milanpi_1.0.0.5
Amd	Epyc 7743 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7763 Firmware	< milanpi_1.0.0.5
Amd	Epyc 7773x Firmware	< milanpi_1.0.0.5

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032Vendor Advisory

Timeline

Published: Jan 11, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-20528?

Insufficient input validation in the SMU may allow a physical attacker to exfiltrate SMU memory contents over the I2C bus potentially leading to a loss of confidentiality.

How severe is CVE-2023-20528?

CVE-2023-20528 has a CVSS score of 2.4/10 (LOW severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2023-20528?

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-2023-20528?

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

Scan your code now

Source: NVD / NIST