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CVE-2026-23101 Linux CVE debrief

A race condition vulnerability in the Linux kernel's LED class allows for a potential null pointer dereference. The issue arises from adding an LED to the leds_list before it is fully initialized, which can cause a crash when a trigger is registered for the LED. This vulnerability affects Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux-based systems. The issue was resolved by only adding the LED to the leds_list when it is fully ready. The vulnerability was introduced in the Linux kernel's LED class, where an LED was added to the leds_list before it was fully initialized. This can cause a null pointer dereference when a trigger is The de

Vendor
Linux
Product
Unknown
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-02-04
Original CVE updated
2026-10-19
Advisory published
2026-02-04
Advisory updated
2026-10-19

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux-based systems should review and apply the patch to the Linux kernel's LED class. They should also verify that the Linux kernel version is not vulnerable and monitor for potential crashes or null pointer dereferences. Additionally, they should confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Why it matters

A race condition vulnerability in the Linux kernel's LED class allows for a potential null pointer dereference, which can cause system crashes or security issues.

  • Potential system crashes or null pointer dereferences
  • Verification of Linux kernel version and patch application
  • Monitoring for potential security issues related to LED triggers

Technical summary

The Linux kernel's LED class has a race condition vulnerability that allows for a potential null pointer dereference. The issue arises from adding an LED to the leds_list before it is fully initialized, which can cause a crash when a trigger is registered for the LED. The vulnerability was resolved by only adding the LED to the leds_list when it is fully ready. The issue affects Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux-based systems. The vulnerability was introduced in the Linux kernel's LED class, where an LED was added to the leds_list before it was fully initialized.

Defensive priority

Medium

Recommended defensive actions

  • Review and apply the patch to the Linux kernel's LED class
  • Verify that the Linux kernel version is not vulnerable
  • Monitor for potential crashes or null pointer dereferences
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The vulnerability was introduced in the Linux kernel's LED class, where an LED was added to the leds_list before it was fully initialized. This can cause a null pointer dereference when a trigger is registered for the LED. The issue was resolved by only adding the LED to the leds_list when it is fully ready.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-23101 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-23101

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-23101 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-23101

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • leds: led-class: Only Add LED to leds_list when it is fully ready

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23101.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/f7a6df659af777058833802c29b3b7974db5e78a

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/d117fdcb21b05c0e0460261d017b92303cd9ba77

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/e90c861411fc84629a240384b0a72830539d3386

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/2757f7748ce2d0fa44112024907bafb37e104d6e

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/da565bf98c9ad0eabcb09fc97859e0b52f98b7c3

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/78822628165f3d817382f67f91129161159ca234

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/d1883cefd31752f0504b94c3bcfa1f6d511d6e87

    Supplemental source

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.