CVE-2026-63845 drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0 ring

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set nouserfence for JPEG v4.0 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. cherry picked from commit 8d0cac9478a3f046279c657d6a2545de49ae675a...

CVE-2026-63845

The CVE-2026-63845 entry concerns the Linux kernel DRM/AMDGPU JPEG driver: JPEG v4.0 rings do not support 64-bit user fence writes, and submissions using user fences are rejected. This is a local, low-privilege path (LOCAL, LOW attack complexity, user interaction NONE) with high impact on confide...