CVE-2022-35894: Insyde INSYDEH2O

Medium severity, CVSS 6.0. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. The SMI handler for the FwBlockServiceSmm driver uses an untrusted pointer as the location to copy data to an attacker-specified buffer, leading to information disclosure.

Affected products

• Insyde INSYDEH2O: from 5.0, before 05.09.37 (fixed in 05.09.37); from 5.1, before 5.17.37 (fixed in 5.17.37); from 5.2, before 05.27.29 (fixed in 05.27.29); from 5.3, before 05.36.29 (fixed in 05.36.29); from 5.4, before 05.44.29 (fixed in 05.44.29); from 5.5, before 05.52.29 (fixed in 05.52.29)

Published 2022-09-22. Last modified 2026-06-17.