UBUNTU-CVE-2026-68101

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix check in amdgpuhmminvalidategfx For a short moment during alloc/free the userptr BO is not part of his VM, so bo-vmbo can be NULL. Keep a reference to the VM root PD as parent of the userptr BO so that we can alwa...