Insyde's Security Pledge
Recent Security Advisories

INSYDE-SA-2022001
Product
CVSS Score
Original Date
Last Revised
InsydeH2O
8.2
2022-01-04
2022-02-08
Summary
A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(CommBufferData). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.
Vulnerability Details
CVSS Vector: AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
This corresponds to CVE-2021-45971. It affects the driver SdHostDriver. This issue was discovered by Insyde engineering during an internal security review of several Insyde drivers and entered as a security incident on May 28, 2021. It was independently reported by Binarly (BRLY-2021-012) in September 2021 It was fixed in the following Insyde kernel versions on June 18, 2021.
Solution Information
Kernel 5.1: 05.16.25
Kernel 5.2: 05.26.25
Kernel 5.3: 05.35.25
Kernel 5.4: 05.43.25
Kernel 5.5: 05.51.25.
It was previously reported incorrectly as part of CVE-2020-27339.
Acknowledgements
Revision History
Revision #
Date
Description
1
2022-01-04
Initial Release
1.1
2022-02-08
Added CVSS Rating