---
cve: "CVE-2026-89802"
severity: "LOW"
cvss: 3.1
epss: "2.9%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-16 11:16:45"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T02:13:09+02:00"
---

# CVE-2026-89802

> 3.1 LOW

## Beschreibung

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.

## Patch verfügbar (OSV)

- Kernel ≥ 6.12.110
- Kernel ≥ 6.18.51
- Kernel ≥ 7.2.5

## Referenzen

- <https://git.kernel.org/stable/c/3bf493cf7ed0c2b3df728977a257e0d99b4db1c6>
- <https://git.kernel.org/stable/c/b7dc03e09313d22a6d230b759de3b05d504c008f>
- <https://git.kernel.org/stable/c/3857238de6bce6c1573e8cb86c37b067e5208f05>
- <https://git.kernel.org/stable/c/412a6ceb56d501ef2f8202e26ab4b5d4dfbca566>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-89802) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_