CVE-2023-20528: amd 2nd gen epyc Improper Input Validation
CVSS: 2.4v3.1LowModified
Published 10-01-2023Last modified 07-04-2025
Vulnerability summary
CVE-2023-20528 is a low (CVSS 2.4) Improper Input Validation vulnerability in amd 2nd gen epyc. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.5% of scored vulnerabilities.
CVSS score
2.4/10
010
Low · v3.1 (CVE.org)EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 10-01-2023PublishedVulnerability first disclosed.
- 07-04-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 2 sources · 1 versionLow 2.4Preferred score · CVE.org (CNA)
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NSourcesAll 2 agree
- NVDNIST2.4LowCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
15%
Versus all other CVEs
30-day change
0.00 pp
From 0.24% on 20-09-2026
20-09-202620-10-2026
EPSS score0.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Amd52 products
- 2nd gen epycvarious
- 3rd gen epycvarious
- epyc_7002_firmware< romepi_1.0.0.c
- epyc_7003_firmware< milanpi_1.0.0.5
- epyc_7232p_firmware< romepi_1.0.0.c
1 vendor · 52 products