Insyde Security Advisory 2022023

Insyde ID Advisory Category Impact of Vulnerability Severity Rating Original Date Last Revised
INSYDE-SA-2022023 Software AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H 8.2 02/01/2022 02/01/2022


An unsafe pointer vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler. An attacker can use this unsafe pointer "ptr" to read or write or manipulate data in the SMRAM. Exploitation of this vulnerability can lead to escalation of privileges reserved only for SMM using the SwSMI handler.

Vulnerability Details


This corresponds to CVE-2021-41838. It affects the NvmExpressDxe driver. This issue was discovered by the Binarly efiXplorer team. The fixed versions are Kernel 5.1: 05.16.42, Kernel 5.2: 05.26.42, Kernel 5.3: 05.35.42, Kernel 5.4: 05.43.42, Kernel 5.5: 05.51.42


Insyde Software would like to thank Binarly for reporting this issue.

Revision History:

Revision Date Description
1.0 02/01/2022 Initial Release
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