CVE-2022-35893: Insyde INSYDEH2O

High severity, CVSS 8.2. EPSS: 0.2% chance of exploitation in the next 30 days.

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM memory corruption vulnerability in the FvbServicesRuntimeDxe driver allows an attacker to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.

Affected products

• Insyde INSYDEH2O: from 5.0, before 05.09.37 (fixed in 05.09.37); from 5.1, before 05.17.37 (fixed in 05.17.37); 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 2022-09-23. Last modified 2026-06-17.