CVE-2026-80888 drm/vmwgfx: drop dma_buf reference on foreign-fd prime import

In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: drop dmabuf reference on foreign-fd prime import ttmprimefdtohandle returns -ENOSYS when the imported fd's dmabuf-ops do not match the ttmobjectdevice's ops, but does so without releasing the reference acquired by...