CVE-2021-26331: amd 1st gen amd epyc™ Improper Input Validation
CVSS: 7.8v3.1HighModified
Published 16-11-2021Last modified 16-09-2024
Vulnerability summary
CVE-2021-26331 is a high (CVSS 7.8) Improper Input Validation vulnerability in amd 1st gen amd epyc™. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.7% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
0.29%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 16-11-2021PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
Description
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox entries leading to arbitrary code execution.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.2Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
21%
Versus all other CVEs
30-day change
0.00 pp
From 0.29% on 19-09-2026
19-09-202619-10-2026
EPSS score0.29%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Amd61 products
- 1st gen amd epyc™≥ unspecified, < NaplesPI-SP3_1.0.0.G
- 2nd gen amd epyc™≥ unspecified, < RomePI-SP3_1.0.0.C
- 3rd gen amd epyc™≥ unspecified, < MilanPI-SP3_1.0.0.4
- epyc_7001_firmware< naplespi-sp3_1.0.0.g
- epyc_7002_firmware< romepi-sp3_1.0.0.c
1 vendor · 61 products