Affected: Siemens RUGGEDCOM APE1808 - BIOS, Siemens SIMATIC Field PG M5, Siemens SIMATIC Field PG M6, Siemens SIMATIC IPC127E, Siemens SIMATIC IPC227G, Siemens SIMATIC IPC277G, Siemens SIMATIC IPC277G PRO, Siemens SIMATIC IPC327G, Siemens SIMATIC IPC377G, Siemens SIMATIC IPC427E and 8 more

An issue was discovered in SdHostDriver in Insyde InsydeH2O with kernel 5.1 before 05.16.25, 5.2 before 05.26.25, 5.3 before 05.35.25, 5.4 before 05.43.25, and 5.5 before 05.51.25. A vulnerability exists in the SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer (CommBufferData).