Insyde's Security Pledge

SMM callout vulnerability allowing a possible attacker to hijack execution flow of a code running in System Management Mode. Exploiting this issue could lead to escalating privileges to SMM.

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

CVE-2021-43323

This issue corresponds to CVE-2021-43323. It affects the UsbCoreDxe driver. It was reported by the Binarly efiXplorer team.

The fixes are available for the Insyde kernel: Kernel 5.0: 05.08.45, Kernel 5.1: 05.16.45, Kernel 5.2: 05.26.45, Kernel 5.3: 05.35.45, Kernel 5.4: 05.43.45, Kernel 5.5: 05.51.45.

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