The latest security information on Intel® products.
EDK II Untested memory not covered by SMM page protection
Intel is releasing firmware updates to improve System Management Mode (SMM) protection.
Incorrect handling of memory types in Tianocore firmware potentially allows a local attacker to bypass SMM protections on memory.
• High 8.2 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Firmware based on Tianocore
Intel recommends that end-users contact their system manufacturers for updated system firmware.
• Patches for Tianocore are listed in the Tianocore Security Bugzilla: https://bugzilla.tianocore.org/show_bug.cgi?id=751
• Intel has released updated firmware to address this issue: https://github.com/otcshare/CCG-CNLCFLGenericFull/commit/b7463d0ec1d57c625094f7ade1831c23cdf8f664
The issue was reported through TianoCore Bugzilla.
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