CVE-2025-38047 is a vulnerability in the Linux kernel's x86 FRED feature that causes a system hang during resume from S4 (hibernation) when FRED is enabled. The issue arises because the image kernel resumes with FRED MSRs (Model-Specific Registers) set by the restore kernel, which may differ from the expected values. This mismatch can lead to a system hang. The fix ensures the image kernel recomputes and sets the FRED MSRs correctly upon resume.