Linux Kernel up to 6.12.109/6.18.50/7.2.4/7.3-rc1 UVMM drm/nouveau/uvmm drm_gpuva_ops_free ops null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel up to 6.12.109/6.18.50/7.2.4/7.3-rc1. This affects the function drm_gpuva_ops_free of the file drm/nouveau/uvmm of the component UVMM. Executing a manipulation of the argument ops can lead to null pointer dereference. This vulnerability is handled as CVE-2026-89802. It is possible to launch the attack on the local host. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.12.109/6.18.50/7.2.4/7.3-rc1 and classified as problematic. This vulnerability affects the function drm_gpuva_ops_free of the file drm/nouveau/uvmm of the component UVMM. The manipulation of the argument ops with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-89802 since 09/11/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Upgrading to version 6.12.110, 6.18.51, 7.2.5 or 7.3-rc2 eliminates this vulnerability. Applying the patch 3bf493cf7ed0c2b3df728977a257e0d99b4db1c6/b7dc03e09313d22a6d230b759de3b05d504c008f/3857238de6bce6c1573e8cb86c37b067e5208f05/412a6ceb56d501ef2f8202e26ab4b5d4dfbca566 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.110/6.18.51/7.2.5/7.3-rc2
Patch: 3bf493cf7ed0c2b3df728977a257e0d99b4db1c6/b7dc03e09313d22a6d230b759de3b05d504c008f/3857238de6bce6c1573e8cb86c37b067e5208f05/412a6ceb56d501ef2f8202e26ab4b5d4dfbca566

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89802 (🔒)
GCVE (CVE): GCVE-0-2026-89802
GCVE (VulDB): GCVE-100-405616

Entryinfo

Created: 09/16/2026 12:52
Changes: 09/16/2026 12:52 (61)
Complete: 🔍
Cache ID: 216::103

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