Insyde's Security Pledge
Recent Security Advisories

INSYDE-SA-2023002
Product
CVSS Score
Original Date
Last Revised
InsydeH2O
8.2
2023-02-14
Summary
DMA attacks on the FwBlockServiceSmm shared buffer used by SMM and non-SMM code could cause TOCTOU issues which could lead to corruption of SMRAM and escalation of privileges
Vulnerability Details
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
DMA attacks on the FwBlockServiceSmm shared buffer used by SMM and non-SMM code could cause TOCTOU issues which could lead to corruption of SMRAM and escalation of privileges. This issue was discovered by Insyde engineering.
Solution Information
Kernel 5.2: 05.27.27
Kernel 5.3: 05.36.27
Kernel 5.4: 05.44.27
Kernel 5.5: 05.52.27
CWE-367
Acknowledgements
Revision History
Revision #
Date
Description
1
2023-02-14
Initial Release