CVE-2026-89591

Kernel crash via Rocket job cleanup

Published Sep 11, 2026 · Updated Sep 11, 2026

NULL-pointer dereference in Linux 6.18 allows local users to crash the kernel through a failed Rocket accelerator job submission. On allocation failures, rocket_ioctl_submit_job() releases a job before job->domain is assigned, while rocket_copy_tasks() leaves a freed task pointer for common cleanup to free again. Reaching the flaw requires an enabled Rocket driver on an ARM64 Rockchip system with a compatible NPU and a failing allocation, task copy, or buffer lookup.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL-pointer dereference in Linux 6.18 allows local users to crash the kernel through a failed Rocket accelerator job submission. On allocation failures, rocket_ioctl_submit_job() releases a job before job->domain is assigned, while rocket_copy_tasks() leaves a freed task pointer for common cleanup to free again. Reaching the flaw requires an enabled Rocket driver on an ARM64 Rockchip system with a compatible NPU and a failing allocation, task copy, or buffer lookup.

The record

CVE
CVE-2026-89591
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=0810d5ad88a18f1e6d549853a388ad0316f74e36 <3043230296653a609ab50006899e64bbb2d99465
  2. Affected versionversion=0810d5ad88a18f1e6d549853a388ad0316f74e36 <70e6a33d68a9b03335c5426332666e52d07f45d6
  3. Affected versionversion=0810d5ad88a18f1e6d549853a388ad0316f74e36 <81731f1eda5e6a1dfad31445f741de9bbefbb08e
  4. Affected versionversion=6.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0810d5ad88a18f1e6d549853a388ad0316f74e36 <3043230296653a609ab50006899e64bbb2d99465; version=0810d5ad88a18f1e6d549853a388ad0316f74e36 <70e6a33d68a9b03335c5426332666e52d07f45d6; version=0810d5ad88a18f1e6d549853a388ad0316f74e36 <81731f1eda5e6a1dfad31445f741de9bbefbb08e; version=6.18

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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