CVE-2021-26321: amd 1st gen amd epyc™ Improper Input Validation
CVSS: 5.5v3.1MediumModified
Published 16-11-2021Last modified 16-09-2024
Vulnerability summary
CVE-2021-26321 is a medium (CVSS 5.5) Improper Input Validation vulnerability in amd 1st gen amd epyc™. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.6% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.25%
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
Insufficient ID command validation in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesSingle source
Medium 4.9Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:N/I:N/A:CSourcesSingle source
EPSS trend
Probability
0.25%
Chance of exploitation in the next 30 days
Percentile
16%
Versus all other CVEs
30-day change
0.00 pp
From 0.25% on 19-09-2026
19-09-202619-10-2026
EPSS score0.25%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
Affected systems
Amd60 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_7232p_firmware< romepi-sp3_1.0.0.c
- epyc_7251_firmware< naplespi-sp3_1.0.0.g
1 vendor · 60 products