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CVE-2022-32476: insyde insydeh2o

CVSS: 7.0v3.1HighModified
Published 15-02-2023Last modified 20-03-2025
Open JSON

Vulnerability summary

CVE-2022-32476 is a high (CVSS 7.0) vulnerability in insyde insydeh2o. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.5% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.0/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
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. 15-02-2023
    PublishedVulnerability first disclosed.
  2. 20-03-2025
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the AhciBusDxe shared buffer used by SMM and non-SMM code could cause TOCTOU race-condition issues that could lead to corruption of SMRAM and escalation of privileges. This attack can be mitigated using IOMMU protection for the ACPI runtime memory used for the command buffer. This attack can be mitigated by copying the firmware block services data to SMRAM before checking it.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.13%

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≥ 5.0, < 5.2.05.27.27 | ≥ 5.3, < 5.3.05.36.27 | ≥ 5.4, < 5.4.05.44.27 | ≥ 5.5, < 5.5.05.52.27

1 vendor · 1 product

References

2 links