CVE-2023-20521: amd 1st gen amd epyc™ processors
CVSS: 5.7v3.1MediumModified
Published 14-11-2023Last modified 02-08-2024
Vulnerability summary
CVE-2023-20521 is a medium (CVSS 5.7) vulnerability in amd 1st gen amd epyc™ processors. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17% of scored vulnerabilities.
CVSS score
5.7/10
010
Medium · v3.1 (NVD)EPSS score
0.26%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 14-11-2023PublishedVulnerability first disclosed.
- 02-08-2024Last modifiedVulnerability information updated.
Description
TOCTOU in the ASP Bootloader may allow an attacker with physical access to tamper with SPI ROM records after memory content verification, potentially leading to loss of confidentiality or a denial of service.
CVSS metrics
2 scores · 2 sources · 1 versionMedium 5.7Preferred score · NVD (NIST)
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:HSources2 sources · 3.3–5.7
- CVE.orgCNA3.3LowCVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:LDiffers
EPSS trend
Probability
0.26%
Chance of exploitation in the next 30 days
Percentile
17%
Versus all other CVEs
30-day change
0.00 pp
From 0.26% on 20-09-2026
20-09-202620-10-2026
EPSS score0.26%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Amd107 products
- 1st gen amd epyc™ processorsvarious
- 2nd gen amd epyc™ processorsvarious
- 3rd gen amd epyc™ processorsvarious
- amd_3015ce_firmware< pollockpi-ft5_1.0.0.4
- amd_3015e_firmware< pollockpi-ft5_1.0.0.4
1 vendor · 107 products