CVE-2026-46255

Kernel warnings via duplicate clock disable

Published Jun 3, 2026 · Updated Jun 3, 2026

Improper clock management in the fsl-edma driver in Linux Kernel allows local users to trigger kernel warnings during driver removal. The fsl_edma_remove function manually disables muxclk clocks already managed by devm_clk_get_enabled, causing duplicate disable and unprepare operations. Reaching the removal path requires root or CAP_SYS_ADMIN to unbind the platform driver through sysfs; no unprivileged trigger is reported.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper clock management in the fsl-edma driver in Linux Kernel allows local users to trigger kernel warnings during driver removal. The fsl_edma_remove function manually disables muxclk clocks already managed by devm_clk_get_enabled, causing duplicate disable and unprepare operations. Reaching the removal path requires root or CAP_SYS_ADMIN to unbind the platform driver through sysfs; no unprivileged trigger is reported.

The record

CVE
CVE-2026-46255
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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=6.6
  2. Affected versionversion=a9903de3aa16731846bf924342eca44bdabe9be6 <533d495f15e4c88ad5246c7f90ae026702e28d75
  3. Affected versionversion=a9903de3aa16731846bf924342eca44bdabe9be6 <666c53e94c1d0bf0bdf14c49505ece9ddbe725bc
  4. Affected versionversion=a9903de3aa16731846bf924342eca44bdabe9be6 <68feac21bd4de7ae4faba05704c404861d991fcf
  5. Affected versionversion=a9903de3aa16731846bf924342eca44bdabe9be6 <b84dba68c4823da452cec99a5d213571a65d06de
  6. Affected versionversion=a9903de3aa16731846bf924342eca44bdabe9be6 <bda244871179543dd3be7d093236cb33b2fb1765

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.6; version=a9903de3aa16731846bf924342eca44bdabe9be6 <533d495f15e4c88ad5246c7f90ae026702e28d75; version=a9903de3aa16731846bf924342eca44bdabe9be6 <666c53e94c1d0bf0bdf14c49505ece9ddbe725bc; version=a9903de3aa16731846bf924342eca44bdabe9be6 <68feac21bd4de7ae4faba05704c404861d991fcf; version=a9903de3aa16731846bf924342eca44bdabe9be6 <b84dba68c4823da452cec99a5d213571a65d06de; version=a9903de3aa16731846bf924342eca44bdabe9be6 <bda244871179543dd3be7d093236cb33b2fb1765

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
Privilegesadmin
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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