Branch: refs/heads/security-advisory/cve-2025-3770/advisory
Home: https://github.com/tianocore/edk2
Commit: ab20711f6f6c7011792daaaaa14e2191399d4ba6
https://github.com/tianocore/edk2/commit/ab20711f6f6c7011792daaaaa14e2191399d4ba6
Author: John Mathews <john.math...@intel.com>
Date: 2025-08-01 (Fri, 01 Aug 2025)
Changed paths:
M UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm
Log Message:
-----------
UefiCpuPkg/PiSmmCpuDxeSmm: Safe handling of IDT register on SMM entry
(CVE-2025-3770)
Do not assume that IDT.limit is loaded with a zero value upon SMM entry.
Delay enabling Machine Check Exceptions in SMM until after the SMM IDT
has been reloaded.
Signed-off-by: John Mathews <john.math...@intel.com>
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