Description
In the Linux kernel, the following vulnerability has been resolved:
drm/nouveau/uvmm: fix NULL deref unwinding an OP_MAP_SPARSE op
Each bind_job_op is zeroed by kzalloc_obj() in bind_job_op_from_uop(), and the OP_MAP_SPARSE case in nouveau_uvmm_bind_job_submit() only creates a region, so op->ops stays NULL for a successfully processed sparse map.
If a later op in the same job fails, the reverse unwind loop revisits that op and calls drm_gpuva_ops_free(&uvmm->base, op->ops) unconditionally. drm_gpuva_ops_free() dereferences its argument right away (list_for_each_entry_safe on &ops->list), so a NULL op->ops oopses. The path is reachable by any render-node fd holder, since NOUVEAU_VM_BIND is DRM_RENDER_ALLOW.
Guard the free with IS_ERR_OR_NULL(), as nouveau_uvmm_bind_job_cleanup() already does for the identical free.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= b88baab828713ce0b49b185444b2ee83bed373a8, < d8ec34618e71018fd7a3f73c57c6b92d71a6c7c3; >= b88baab828713ce0b49b185444b2ee83bed373a8, < 3bf493cf7ed0c2b3df728977a257e0d99b4db1c6; >= b88baab828713ce0b49b185444b2ee83bed373a8, < b7dc03e09313d22a6d230b759de3b05d504c008f; >= b88baab828713ce0b49b185444b2ee83bed373a8, < 3857238de6bce6c1573e8cb86c37b067e5208f05; >= b88baab828713ce0b49b185444b2ee83bed373a8, < 412a6ceb56d501ef2f8202e26ab4b5d4dfbca566 |
| Linux | Linux | 6.6 |
References
- https://git.kernel.org/stable/c/3857238de6bce6c1573e8cb86c37b067e5208f05
- https://git.kernel.org/stable/c/3bf493cf7ed0c2b3df728977a257e0d99b4db1c6
- https://git.kernel.org/stable/c/412a6ceb56d501ef2f8202e26ab4b5d4dfbca566
- https://git.kernel.org/stable/c/b7dc03e09313d22a6d230b759de3b05d504c008f
- https://git.kernel.org/stable/c/d8ec34618e71018fd7a3f73c57c6b92d71a6c7c3
Timeline
- Published
- Sep 16, 2026
- Last modified
- Oct 21, 2026
- NVD status
- Received