Insyde's Security Pledge
Insyde Security Advisory 2022024
| Insyde ID | Advisory Category | Impact of Vulnerability | Severity Rating | Original Date | Last Revised |
| INSYDE-SA-2022024 | 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 |
Summary:
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.
Vulnerability Details
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
Acknowledgements:
Insyde Software would like to thank Binarly for reporting this issue.
Revision History:
| Revision | Date | Description |
| 1.0 | 02/01/2022 | Initial Release |
| - | - | - |