CVE-2026-72109

Unspecified impact via stale blocking notifier registration

Published Aug 15, 2026 · Updated Aug 15, 2026

Improper cleanup in Linux 5.14 allows attackers to cause unspecified impact via failed Sparx5 workqueue allocation. sparx5_register_notifier_blocks() registers the switchdev blocking notifier before allocating its ordered workqueue, but the failure path omits that notifier's unregistration. Public sources identify neither an attacker-controlled way to force allocation failure nor the consequence of invoking the stale notifier after initialization unwinds.

CVSS severity4.1
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper cleanup in Linux 5.14 allows attackers to cause unspecified impact via failed Sparx5 workqueue allocation. sparx5_register_notifier_blocks() registers the switchdev blocking notifier before allocating its ordered workqueue, but the failure path omits that notifier's unregistration. Public sources identify neither an attacker-controlled way to force allocation failure nor the consequence of invoking the stale notifier after initialization unwinds.

The record

CVE
CVE-2026-72109
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=5.14
  2. Affected versionversion=d6fce5141929697a27f029c633433d487f6f62cb <17f113e7b622dc850992ade540181717de6a8561
  3. Affected versionversion=d6fce5141929697a27f029c633433d487f6f62cb <483be61b4a9a6df3b7cb277e8f189e082dee4cb8
  4. Affected versionversion=d6fce5141929697a27f029c633433d487f6f62cb <8a3c44a003176282ee4306b7c96e5a536c6f0707
  5. Affected versionversion=d6fce5141929697a27f029c633433d487f6f62cb <cf419c869e0d03aad4b6f4ecf0a813851930dfe7
  6. Affected versionversion=d6fce5141929697a27f029c633433d487f6f62cb <d6084c47389fd6978a5d66b0d58206a548c792a9
  7. Affected versionversion=d6fce5141929697a27f029c633433d487f6f62cb <e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3
  8. Affected versionversion=d6fce5141929697a27f029c633433d487f6f62cb <fbc65b17508ed5464b7106e7fa5f15251ca1b603

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=d6fce5141929697a27f029c633433d487f6f62cb <17f113e7b622dc850992ade540181717de6a8561; version=d6fce5141929697a27f029c633433d487f6f62cb <483be61b4a9a6df3b7cb277e8f189e082dee4cb8; version=d6fce5141929697a27f029c633433d487f6f62cb <8a3c44a003176282ee4306b7c96e5a536c6f0707; version=d6fce5141929697a27f029c633433d487f6f62cb <cf419c869e0d03aad4b6f4ecf0a813851930dfe7; version=d6fce5141929697a27f029c633433d487f6f62cb <d6084c47389fd6978a5d66b0d58206a548c792a9; version=d6fce5141929697a27f029c633433d487f6f62cb <e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3; version=d6fce5141929697a27f029c633433d487f6f62cb <fbc65b17508ed5464b7106e7fa5f15251ca1b603

Published CVSS scores

4.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

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)
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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