7.5

CVE-2024-52877: insyde insydeh2o Buffer Over-read

CVSS: 7.5v3.1HighAnalyzed
Published 15-05-2025Last modified 19-05-2025
Open JSON

Vulnerability summary

CVE-2024-52877 is a high (CVSS 7.5) Buffer Over-read vulnerability in insyde insydeh2o. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.48%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-05-2025
    PublishedVulnerability first disclosed.
  2. 19-05-2025
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Insyde InsydeH2O kernel 5.2 before version 05.29.50, kernel 5.3 before version 05.38.50, kernel 5.4 before version 05.46.50, kernel 5.5 before version 05.54.50, kernel 5.6 before version 05.61.50, and kernel 5.7 before version 05.70.50. In VariableRuntimeDxe driver, callback function SmmCreateVariableLockList () calls CreateVariableLockListInSmm (). In CreateVariableLockListInSmm (), it uses StrSize () to get variable name size and it could lead to a buffer over-read.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

+0.02 pp

From 0.46% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.48%

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

Insyde1 product
  • insydeh2o≥ 5.2, < 5.2.05.29.50 | ≥ 5.3, < 5.3.05.38.50 | ≥ 5.4, < 5.4.05.46.50 | ≥ 5.5, < 5.5.05.54.50 | ≥ 5.6, < 5.6.05.61.50 | ≥ 5.7, < 5.7.05.70.50

1 vendor · 1 product

References

2 links