Siemens InsydeH2O Out-of-bounds Write (CVE-2021-42554)

An issue was discovered in Insyde InsydeH2O with Kernel 5.0 before 05.08.42, Kernel 5.1 before 05.16.42, Kernel 5.2 before 05.26.42, Kernel 5.3 before 05.35.42, Kernel 5.4 before 05.42.51, and Kernel 5.5 before 05.50.51. An SMM memory corruption vulnerability in FvbServicesRuntimeDxe allows a...

CVE-2021-42554

CVE-2021-42554 concerns an SMM memory corruption in InsydeH2O’s FvbServicesRuntimeDxe, allowing an attacker to write fixed or predictable data to SMRAM and potentially escalate to System Management Mode. Affected firmware is InsydeH2O with Kernel 5.0 before 05.08.42, 5.1 before 05.16.42, 5.2 befo...