CVE-2022-32475: Insyde INSYDEH2O

High severity, CVSS 7.0. EPSS: 0.1% chance of exploitation in the next 30 days.

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the VariableRuntimeDxe 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 issue was fixed in the kernel, which also protected chipset and OEM chipset code.

Affected products

• Insyde INSYDEH2O: from 5.0, before 5.2.05.27.27 (fixed in 5.2.05.27.27); from 5.3, before 5.3.05.36.27 (fixed in 5.3.05.36.27); from 5.4, before 5.4.05.44.27 (fixed in 5.4.05.44.27); from 5.5, before 5.5.05.52.27 (fixed in 5.5.05.52.27)

Published 2023-02-15. Last modified 2026-06-17.