CVE-2026-89871

Kernel crash via retained kthread error pointer

Published Sep 16, 2026 · Updated Sep 16, 2026

Improper error handling in the Linux video-i2c driver allows local users to crash the kernel after capture-thread creation fails. The start_streaming path stores kthread_run's ERR_PTR in kthread_vid_cap, and stop_streaming later passes that error pointer to kthread_stop instead of treating it as a failed thread creation. The path requires access to an affected video-I2C capture device and a failed capture-thread creation before streaming is stopped.

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

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Summary

What happened

Improper error handling in the Linux video-i2c driver allows local users to crash the kernel after capture-thread creation fails. The start_streaming path stores kthread_run's ERR_PTR in kthread_vid_cap, and stop_streaming later passes that error pointer to kthread_stop instead of treating it as a failed thread creation. The path requires access to an affected video-I2C capture device and a failed capture-thread creation before streaming is stopped.

The record

CVE
CVE-2026-89871
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
Unavailable

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=4.18
  2. Affected versionversion=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <0e7f2cd72a4f9268ee09a13b13f3339e7cc71557
  3. Affected versionversion=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <0fac63cac6689588da530764ccb6ba55ee8e4d8b
  4. Affected versionversion=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <3d1b10d81fe54852ed953f4129577b733bbd6907
  5. Affected versionversion=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6
  6. Affected versionversion=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <5c35d380bea60503c4fe0986fe1de6a3263282b3
  7. Affected versionversion=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <76e379754ba618989f6215be608d5c04774a611d
  8. Affected versionversion=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <968c5213e34c48d35febdfd09cf3dc58ad039140
  9. Affected versionversion=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <db0f4531aa55cfb0171684ebfffe3ff04b79d5a8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <0e7f2cd72a4f9268ee09a13b13f3339e7cc71557; version=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <0fac63cac6689588da530764ccb6ba55ee8e4d8b; version=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <3d1b10d81fe54852ed953f4129577b733bbd6907; version=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6; version=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <5c35d380bea60503c4fe0986fe1de6a3263282b3; version=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <76e379754ba618989f6215be608d5c04774a611d; version=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <968c5213e34c48d35febdfd09cf3dc58ad039140; version=5cebaac609744414463d1ecc28fdecd26c1b9bc1 <db0f4531aa55cfb0171684ebfffe3ff04b79d5a8

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
PrivilegesUnavailable
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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