CVE-2025-38435 riscv: vector: Fix context save/restore with xtheadvector

In the Linux kernel, the following vulnerability has been resolved: riscv: vector: Fix context save/restore with xtheadvector Previously only v0-v7 were correctly saved/restored, and the context of v8-v31 are damanged. Correctly save/restore v8-v31 to avoid breaking userspace...

CVE-2025-38435

CVE-2025-38435 affects the Linux kernel RISCV vector context handling. The issue: incorrect saving/restoring of vector registers v8–v31 during context save/restore with xtheadvector, risking userspace breakage. Affected component: riscv vector code in the kernel; root cause is the improper preser...