CVE-2026-23368

System hang via reversed LED trigger locks

Published Mar 25, 2026 · Updated Mar 25, 2026

Improper locking in the Linux Kernel PHY LED trigger path allows local users to hang the system when both LED trigger features are enabled. During phy_attach, phy_led_triggers_register() holds RTNL before taking triggers_list_lock, while netdev trigger activation takes those locks in reverse order. A local user can reach the hang only when both LEDS_TRIGGER_NETDEV and LED_TRIGGER_PHY are enabled, interrupting the affected system until recovery.

CVSS severity5.5
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux Kernel PHY LED trigger path allows local users to hang the system when both LED trigger features are enabled. During phy_attach, phy_led_triggers_register() holds RTNL before taking triggers_list_lock, while netdev trigger activation takes those locks in reverse order. A local user can reach the hang only when both LEDS_TRIGGER_NETDEV and LED_TRIGGER_PHY are enabled, interrupting the affected system until recovery.

The record

CVE
CVE-2026-23368
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <241cd64cf2e32b28ead151b1795cd8fef2b6e482
  2. Affected versionversion=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <2764dcb3c35de4410f642afc62cf979727470575
  3. Affected versionversion=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <c33523b8fd2d4c504ada18cd93f511f2a8f84217
  4. Affected versionversion=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <c6ffc2d2338d325e1edd0c702e3ee623aa5fdc6a
  5. Affected versionversion=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <c8dbdc6e380e7e96a51706db3e4b7870d8a9402d
  6. Affected versionversion=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <cde2d0b5ab5d03b5b6f17d4f654d8b30ccf36757
  7. Affected versionversion=4.16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <241cd64cf2e32b28ead151b1795cd8fef2b6e482; version=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <2764dcb3c35de4410f642afc62cf979727470575; version=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <c33523b8fd2d4c504ada18cd93f511f2a8f84217; version=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <c6ffc2d2338d325e1edd0c702e3ee623aa5fdc6a; version=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <c8dbdc6e380e7e96a51706db3e4b7870d8a9402d; version=06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 <cde2d0b5ab5d03b5b6f17d4f654d8b30ccf36757; version=4.16

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/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.

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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

CWE-667Improper Locking
T1499.004Application or System Exploitation

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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