CVE-2026-68403

Invalid work-item cancellation during failed probe

Published Aug 10, 2026 · Updated Aug 10, 2026

Improper initialization in Linux 4.1 and later causes invalid brcmfmac SDIO work-item cancellation during failed probing. brcmf_sdio_probe() exposes bus->datawork to brcmf_sdio_remove() before INIT_WORK initializes it, and cleanup cancels that uninitialized object. Reachability requires ordered-workqueue allocation to fail during SDIO probing; public records establish an invalid drain diagnostic but no attacker-controlled trigger or broader operational impact.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper initialization in Linux 4.1 and later causes invalid brcmfmac SDIO work-item cancellation during failed probing. brcmf_sdio_probe() exposes bus->datawork to brcmf_sdio_remove() before INIT_WORK initializes it, and cleanup cancels that uninitialized object. Reachability requires ordered-workqueue allocation to fail during SDIO probing; public records establish an invalid drain diagnostic but no attacker-controlled trigger or broader operational impact.

The record

CVE
CVE-2026-68403
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=4.1
  2. Affected versionversion=9982464379e81ece51ced03ebecbbcd34ea367a6 <2a665946e0407a05a3f81bd56a08553c446498e0
  3. Affected versionversion=9982464379e81ece51ced03ebecbbcd34ea367a6 <5c342437ea44bb829680ca9e4f683dd5b325b219
  4. Affected versionversion=9982464379e81ece51ced03ebecbbcd34ea367a6 <6bd21ec8549a5854dd64204a66289952917a924c
  5. Affected versionversion=9982464379e81ece51ced03ebecbbcd34ea367a6 <c73c3fc1c7ca5a927639f0884624cb244ba791e4
  6. Affected versionversion=9982464379e81ece51ced03ebecbbcd34ea367a6 <f50a2b9e57a751e70ae9a272875d80d39eaccd6a

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.1; version=9982464379e81ece51ced03ebecbbcd34ea367a6 <2a665946e0407a05a3f81bd56a08553c446498e0; version=9982464379e81ece51ced03ebecbbcd34ea367a6 <5c342437ea44bb829680ca9e4f683dd5b325b219; version=9982464379e81ece51ced03ebecbbcd34ea367a6 <6bd21ec8549a5854dd64204a66289952917a924c; version=9982464379e81ece51ced03ebecbbcd34ea367a6 <c73c3fc1c7ca5a927639f0884624cb244ba791e4; version=9982464379e81ece51ced03ebecbbcd34ea367a6 <f50a2b9e57a751e70ae9a272875d80d39eaccd6a

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

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
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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