CVE-2023-22613

HIGH

Insyde InsydeH2O 5.0-5.5 - Out-of-bounds Write via Malformed RCX Pointer

Title source: llm

Description

An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. It is possible to write to an attacker-controlled address. An attacker could invoke an SMI handler with a malformed pointer in RCX that overlaps SMRAM, resulting in SMM memory corruption.

References (3)

Core 3

Core References

Not Applicable

https://research.nccgroup.com/2023/04/11/stepping-insyde-system-management-mode/

Vendor Advisory

https://www.insyde.com/security-pledge

Vendor Advisory

https://www.insyde.com/security-pledge/SA-2023023

Scores

CVSS v3 8.8

EPSS 0.0021

EPSS Percentile 11.5%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-787

Status published

Products (4)

insyde/insydeh2o 05.27.37

insyde/insydeh2o 05.36.37

insyde/insydeh2o 05.44.45

insyde/insydeh2o 05.52.45

Published Apr 11, 2023

Tracked Since Feb 18, 2026