{"id":"CVE-2026-89802","published":"2026-09-16T11:16:45.113","lastModified":"2026-09-16T11:16:45.113","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau/uvmm: fix NULL deref unwinding an OP_MAP_SPARSE op\n\nEach bind_job_op is zeroed by kzalloc_obj() in bind_job_op_from_uop(),\nand the OP_MAP_SPARSE case in nouveau_uvmm_bind_job_submit() only creates\na region, so op->ops stays NULL for a successfully processed sparse map.\n\nIf a later op in the same job fails, the reverse unwind loop revisits that\nop and calls drm_gpuva_ops_free(&uvmm->base, op->ops) unconditionally.\ndrm_gpuva_ops_free() dereferences its argument right away\n(list_for_each_entry_safe on &ops->list), so a NULL op->ops oopses. The\npath is reachable by any render-node fd holder, since NOUVEAU_VM_BIND is\nDRM_RENDER_ALLOW.\n\nGuard the free with IS_ERR_OR_NULL(), as nouveau_uvmm_bind_job_cleanup()\nalready does for the identical free.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/3857238de6bce6c1573e8cb86c37b067e5208f05","tags":[]},{"url":"https://git.kernel.org/stable/c/3bf493cf7ed0c2b3df728977a257e0d99b4db1c6","tags":[]},{"url":"https://git.kernel.org/stable/c/412a6ceb56d501ef2f8202e26ab4b5d4dfbca566","tags":[]},{"url":"https://git.kernel.org/stable/c/b7dc03e09313d22a6d230b759de3b05d504c008f","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}