CVE-2024-55567: Insyde INSYDEH2O

Medium severity, CVSS 6.7. EPSS: 0.2% chance of exploitation in the next 30 days.

Improper input validation was discovered in UsbCoreDxe in Insyde InsydeH2O kernel 5.4 before 05.47.01, 5.5 before 05.55.01, 5.6 before 05.62.01, and 5.7 before 05.71.01. The SMM module has an SMM call out vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.

Affected products

• Insyde INSYDEH2O: from 5.4, before 5.4.05.47.01 (fixed in 5.4.05.47.01); from 5.5, before 5.5.05.55.01 (fixed in 5.5.05.55.01); from 5.6, before 5.6.05.62.01 (fixed in 5.6.05.62.01); from 5.7, before 5.7.05.71.01 (fixed in 5.7.05.71.01)

Published 2025-06-12. Last modified 2026-06-17.