Insyde's Security Pledge
Insyde Security Advisory 2022024
|Insyde ID||Advisory Category||Impact of Vulnerability||Severity Rating||Original Date||Last Revised|
An unsafe pointer vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler. An attacker can use this unsafe pointer "current_ptr" to read or write or manipulate data into SMRAM. Exploitation of this vulnerability can lead to escalation of privileges reserved only for SMM using the SwSMI handler.
This corresponds to CVE-2021-41837. It affects the AhciBusDxe driver. This issue was discovered by the Binarly efiXplorer team. The fixed versions of Kernel 5.0: 05.08.41, Kernel 5.1: 05.16.41, Kernel 5.2: 05.26.41, Kernel 5.3: 05.35.41, Kernel 5.4: 05.43.41, Kernel 5.5: 05.51.41
Insyde Software would like to thank Binarly for reporting this issue.