CVE-2026-63856

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set nouserfence for VCN v2.0 enc/dec rings VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. cherry picked from commit...

CVE-2026-63856

In the Linux kernel, CVE-2026-63856 affects the AMDGPU VCN subsystem. The issue stems from not supporting 64-bit user fence writes in VCN v2.0 encoder/decoder rings, leading to rejection of CS submissions that use user fences. A fix was applied by setting no_user_fence for VCN v2.0 enc/dec rings ...

PT-2026-61173

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The VCN encoder and decoder rings in the drm/amdgpu/vcn component do not support 64-bit user fence writes. This issue leads to the rejection of CS submissions that utilize user fences...