CVE-2026-80888

In the Linux kernel, the following vulnerability has been resolved:

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

ttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's

dma_buf->ops do not match the ttm_object_device's ops, but does so

without releasing the reference acquired by dma_buf_get(). Any

unprivileged renderD client passing a non-vmwgfx prime fd through the

DRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per

call and indefinitely pins the foreign exporter's GEM resources.

Funnel the error path through the existing dma_buf_put() so the

reference is always dropped.