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CVE-2021-42554

HIGH CVSS: 8.2 Published: 2022-02-03 Modified: 2026-08-11

Description

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 possible attacker to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.

Affected Platforms

Siemens Simatic Ipc847E FirmwareSiemens Simatic Itp1000 FirmwareSiemens Simatic Ipc627ESiemens Simatic Ipc427ESiemens Ruggedcom Ape1808 FirmwareSiemens Simatic Ipc277GSiemens Simatic Ipc227G FirmwareSiemens Simatic Ipc847EInsyde Insydeh2OSiemens Simatic Ipc127E

Weakness Type

CWE-787

References