msr xfd

About this tag
The tag msr xfd covers discussions about the Model-Specific Register (MSR) IA32_XFD and its interaction with the Linux kernel's extended state management. A key topic is CVE-2024-35801, a kernel bug where a mismatch between the cached per-CPU xfd_state and the MSR_IA32_XFD register causes a machine-check exception (#NM) during XRSTOR, leading to a local denial-of-service. This vulnerability affects x86 systems using FP/SIMD context switching and has been patched by vendors. The tag is relevant for users and administrators dealing with Linux kernel stability, security updates, and hardware register behavior on WindowsForum.com.

  1. CVE-2024-35801: Linux kernel fix for XRSTOR #NM xfd_state mismatch

    The Linux kernel bug tracked as CVE-2024-35801 creates a mismatch between a cached per‑CPU state (xfd_state) and the processor model-specific register MSR_IA32_XFD, allowing normal FP/SIMD context-management operations to trigger a machine‑check (#NM) during XRSTOR and crash the kernel —...