Branch: refs/heads/security-advisory/cve-2025-3770/advisory
Home: https://github.com/tianocore/edk2
Commit: 67e6f2617f14e9dfaafe81e96165763ea5bf0f84
https://github.com/tianocore/edk2/commit/67e6f2617f14e9dfaafe81e96165763ea5bf0f84
Author: John Mathews <[email protected]>
Date: 2025-08-04 (Mon, 04 Aug 2025)
Changed paths:
M UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm
Log Message:
-----------
UefiCpuPkg/PiSmmCpuDxeSmm: Safe handling of IDT register on SMM entry
Mitigates 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 <[email protected]>
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