8.8

CVE-2023-20558: amd 2nd gen amd ryzen™ threadripper™ processor

CVSS: 8.8v3.1HighModified
Published 23-03-2023Last modified 20-02-2025
Open JSON

Vulnerability summary

CVE-2023-20558 is a high (CVSS 8.8) vulnerability in amd 2nd gen amd ryzen™ threadripper™ processor. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 50.9% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.67%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 23-03-2023
    PublishedVulnerability first disclosed.
  2. 20-02-2025
    Last modifiedVulnerability information updated.

Description

Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to an escalation of privileges.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.67%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

0.00 pp

From 0.67% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.67%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Amd96 products

1 vendor · 96 products

References

1 links