4.9

CVE-2023-31347: amd 3rd gen amd epyc™ processors Incorrect Calculation

CVSS: 4.9v3.1MediumModified
AliasesUBUNTU-CVE-2023-31347
Published 13-02-2024Last modified 17-03-2025
Open JSON

Vulnerability summary

CVE-2023-31347 is a medium (CVSS 4.9) Incorrect Calculation vulnerability in amd 3rd gen amd epyc™ processors. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.5% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
4.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.46%
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. 13-02-2024
    PublishedVulnerability first disclosed.
  2. 17-03-2025
    Last modifiedVulnerability information updated.

Description

Due to a code bug in Secure_TSC, SEV firmware may allow an attacker with high privileges to cause a guest to observe an incorrect TSC when Secure TSC is enabled potentially resulting in a loss of guest integrity.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

0.00 pp

From 0.46% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.46%

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

Amd64 products
Ubuntu1 product
  • linux-firmwareAll versions (No fix recorded)

2 vendors · 65 products

References

3 links