CVE-2026-89802 (GCVE-0-2026-89802)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:30 – Updated: 2026-10-21 12:48
VLAI
Title
drm/nouveau/uvmm: fix NULL deref unwinding an OP_MAP_SPARSE op
Summary
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6846 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < d8ec34618e71018fd7a3f73c57c6b92d71a6c7c3 (git)
Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < 3bf493cf7ed0c2b3df728977a257e0d99b4db1c6 (git)
Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < b7dc03e09313d22a6d230b759de3b05d504c008f (git)
Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < 3857238de6bce6c1573e8cb86c37b067e5208f05 (git)
Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < 412a6ceb56d501ef2f8202e26ab4b5d4dfbca566 (git)
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Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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          "value": "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-\u003eops 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(\u0026uvmm-\u003ebase, op-\u003eops) unconditionally.\ndrm_gpuva_ops_free() dereferences its argument right away\n(list_for_each_entry_safe on \u0026ops-\u003elist), so a NULL op-\u003eops 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."
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    "dateReserved": "2026-09-11T19:38:34.767Z",
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}



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