CVE-2026-63850 drm/amdgpu/vcn: set no_user_fence for VCN v5.0.0 enc ring

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set nouserfence for VCN v5.0.0 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. cherry picked from commit...

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...