CVE-2023-22616: Insyde INSYDEH2O

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in Insyde InsydeH2O with kernel 5.2 through 5.5. The Save State register is not checked before use. The IhisiSmm driver does not check the value of a save state register before use. Due to insufficient input validation, an attacker can corrupt SMRAM.

Affected products

• Insyde INSYDEH2O: from 5.2, up to and including 5.5

Published 2023-04-12. Last modified 2026-06-17.