CVE-2026-80633

CVE-2026-80633 affects the Linux kernel 's iommufd subsystem. The root cause is that iopt_release_pages() calls dma_buf_unpin() without holding the exporter's dma_resv lock, as required by the function's assertion. This causes a kernel WARN to fire on every iommufd_ioas_destroy() or iommufd_ioas_...