CVE-2026-23101

Kernel workqueue failure via premature LED list insertion

Published Feb 4, 2026 · Updated Feb 4, 2026

Race condition in affected Linux kernel branches allows local users to trigger a kernel workqueue failure during LED registration. led_classdev_register() adds an LED to leds_list before led_init_core() initializes set_brightness_work, so concurrent default-trigger registration queues uninitialized work. Reachability requires low-privileged local access and a narrow timing window involving successive LED registrations; the documented result is a workqueue warning with no confidentiality or integrity impact.

CVSS severity4.7
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Race condition in affected Linux kernel branches allows local users to trigger a kernel workqueue failure during LED registration. led_classdev_register() adds an LED to leds_list before led_init_core() initializes set_brightness_work, so concurrent default-trigger registration queues uninitialized work. Reachability requires low-privileged local access and a narrow timing window involving successive LED registrations; the documented result is a workqueue warning with no confidentiality or integrity impact.

The record

CVE
CVE-2026-23101
Published
Feb 4, 2026
Updated
Feb 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-908, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.7
  2. Affected versionversion=d23a22a74fded23a12434c9463fe66cec2b0afcd <2757f7748ce2d0fa44112024907bafb37e104d6e
  3. Affected versionversion=d23a22a74fded23a12434c9463fe66cec2b0afcd <78822628165f3d817382f67f91129161159ca234
  4. Affected versionversion=d23a22a74fded23a12434c9463fe66cec2b0afcd <d1883cefd31752f0504b94c3bcfa1f6d511d6e87
  5. Affected versionversion=d23a22a74fded23a12434c9463fe66cec2b0afcd <da565bf98c9ad0eabcb09fc97859e0b52f98b7c3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.7; version=d23a22a74fded23a12434c9463fe66cec2b0afcd <2757f7748ce2d0fa44112024907bafb37e104d6e; version=d23a22a74fded23a12434c9463fe66cec2b0afcd <78822628165f3d817382f67f91129161159ca234; version=d23a22a74fded23a12434c9463fe66cec2b0afcd <d1883cefd31752f0504b94c3bcfa1f6d511d6e87; version=d23a22a74fded23a12434c9463fe66cec2b0afcd <da565bf98c9ad0eabcb09fc97859e0b52f98b7c3

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7UbuntuCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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

CWE-908Use of Uninitialized Resource
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo