8.2

CVE-2022-35895: insyde insydeh2o Out-of-bounds Write

CVSS: 8.2v3.1HighModified
Published 21-09-2022Last modified 05-05-2025
Open JSON

Vulnerability summary

CVE-2022-35895 is a high (CVSS 8.2) Out-of-bounds Write vulnerability in insyde insydeh2o. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
43/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.2/10
010
High · v3.1 (CVE.org)
EPSS score
0.38%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 21-09-2022
    PublishedVulnerability first disclosed.
  2. 05-05-2025
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. The FwBlockSericceSmm driver does not properly validate input parameters for a software SMI routine, leading to memory corruption of arbitrary addresses including SMRAM, and possible arbitrary code execution.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

0.00 pp

From 0.38% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (binarly.io)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Insyde1 product
  • insydeh2o≥ 5.0, < 05.09.37 | ≥ 5.1, < 05.17.37 | ≥ 5.2, < 05.27.29 | ≥ 5.3, < 05.36.29 | ≥ 5.4, < 05.44.29 | ≥ 5.5, < 05.52.29

1 vendor · 1 product

References

3 links