Description
In the kernel in Insyde InsydeH2O 5.x, certain SMM drivers did not correctly validate the CommBuffer and CommBufferSize parameters, allowing callers to corrupt either the firmware or the OS memory. The fixed versions for this issue in the AhciBusDxe, IdeBusDxe, NvmExpressDxe, SdHostDriverDxe, and SdMmcDeviceDxe drivers are 05.16.25, 05.26.25, 05.35.25, 05.43.25, and 05.51.25 (for Kernel 5.1 through 5.5).
Advisories 2
- WID-SEC-2022-2136 Lenovo BIOS: Mehrere Schwachstellen ermöglichen Privilegieneskalation BSI CERT-Bund (WID) · Oct 28, 2026
- SSA-306654 SSA-306654: Insyde BIOS Vulnerabilities in Siemens Industrial Products Siemens ProductCERT · Aug 11, 2026