CVE-2026-89802

Kernel oops via sparse-map unwind NULL dereference

Published Sep 16, 2026 · Updated Sep 16, 2026

NULL pointer dereference in Linux 6.6 allows local users with a Nouveau render-node file descriptor to trigger a kernel oops. During reverse unwind, nouveau_uvmm_bind_job_submit passes the NULL op->ops left by a successful OP_MAP_SPARSE operation to drm_gpuva_ops_free, which dereferences it while traversing its list. Any local render-node file descriptor holder can reach the ioctl path; exploitation interrupts the affected host by oopsing the kernel.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux 6.6 allows local users with a Nouveau render-node file descriptor to trigger a kernel oops. During reverse unwind, nouveau_uvmm_bind_job_submit passes the NULL op->ops left by a successful OP_MAP_SPARSE operation to drm_gpuva_ops_free, which dereferences it while traversing its list. Any local render-node file descriptor holder can reach the ioctl path; exploitation interrupts the affected host by oopsing the kernel.

The record

CVE
CVE-2026-89802
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.6
  2. Affected versionversion=b88baab828713ce0b49b185444b2ee83bed373a8 <3857238de6bce6c1573e8cb86c37b067e5208f05
  3. Affected versionversion=b88baab828713ce0b49b185444b2ee83bed373a8 <3bf493cf7ed0c2b3df728977a257e0d99b4db1c6
  4. Affected versionversion=b88baab828713ce0b49b185444b2ee83bed373a8 <412a6ceb56d501ef2f8202e26ab4b5d4dfbca566
  5. Affected versionversion=b88baab828713ce0b49b185444b2ee83bed373a8 <b7dc03e09313d22a6d230b759de3b05d504c008f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=b88baab828713ce0b49b185444b2ee83bed373a8 <3857238de6bce6c1573e8cb86c37b067e5208f05; version=b88baab828713ce0b49b185444b2ee83bed373a8 <3bf493cf7ed0c2b3df728977a257e0d99b4db1c6; version=b88baab828713ce0b49b185444b2ee83bed373a8 <412a6ceb56d501ef2f8202e26ab4b5d4dfbca566; version=b88baab828713ce0b49b185444b2ee83bed373a8 <b7dc03e09313d22a6d230b759de3b05d504c008f

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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