Insyde's Security Pledge

IhisiServicesSmm: Write To Attacker Controlled Address.

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

CVE-2023-22613

An attacker could invoke a SMI handler with a malformed pointer in RCX that overlaps SMRAM, resulting in SMM memory corruption.

Kernel 5.2: Version 05.27.37
Kernel 5.3: Version 05.36.37
Kernel 5.4: Version 05.44.45
Kernel 5.5: Version 05.52.45

Insyde Software would like to thank Jeremy Boone (@uffeux) of the NCC Group for reporting the vulnerability and engaging in this coordinated disclosure.