CVE-2022-32471

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-02-15 · updated 2026-06-17
Weakness: CWE-367

Description

An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. The IhisiDxe driver uses the command buffer to pass input and output data. By modifying the command buffer contents with DMA after the input parameters have been checked but before they are used, the IHISI SMM code may be convinced to modify SMRAM or OS, leading to possible data corruption or escalation of privileges.

Affected products

Insydeh2O: from 5.0 before 5.2.05.27.37; from 5.3 before 5.3.05.36.37; from 5.4 before 5.4.05.44.45; from 5.5 before 5.5.05.52.45 — fixed in 5.2.05.27.37, 5.3.05.36.37, 5.4.05.44.45, 5.5.05.52.45

How to fix

Upgrade to a fixed version: Insydeh2O 5.2.05.27.37, 5.3.05.36.37, 5.4.05.44.45, 5.5.05.52.45. Check the vendor advisory for mitigations.

References

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