CVE-2023-54236

Kernel warning via oversized primary transmit queue

Published Dec 30, 2025 · Updated Dec 30, 2025

Incorrect queue selection in Linux net_failover allows local users to trigger a kernel warning through traffic on an affected failover device. The net_failover_select_queue() function returns the primary device's selected queue without reducing it to the failover device's 16 transmit queues. The warning requires an active primary device with more than 16 transmit queues and a packet mapped above queue 15; the published record establishes no crash or data compromise.

CVSS severity7.0
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect queue selection in Linux net_failover allows local users to trigger a kernel warning through traffic on an affected failover device. The net_failover_select_queue() function returns the primary device's selected queue without reducing it to the failover device's 16 transmit queues. The warning requires an active primary device with more than 16 transmit queues and a packet mapped above queue 15; the published record establishes no crash or data compromise.

The record

CVE
CVE-2023-54236
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=4.18
  2. Affected versionversion=cfc80d9a11635404a40199a1c9471c96890f3f74 <105cc268328231d5c2bfcbd03f265cec444a3492
  3. Affected versionversion=cfc80d9a11635404a40199a1c9471c96890f3f74 <2d5cebf57296f0189a61482035ad420384eedead
  4. Affected versionversion=cfc80d9a11635404a40199a1c9471c96890f3f74 <44d250c22209c680f61befbc2ac326da5452da01
  5. Affected versionversion=cfc80d9a11635404a40199a1c9471c96890f3f74 <c942f5cd63b7c2e73fe06744185a34b03267595b
  6. Affected versionversion=cfc80d9a11635404a40199a1c9471c96890f3f74 <e3cbdcb0fbb61045ef3ce0e072927cc41737f787
  7. Affected versionversion=cfc80d9a11635404a40199a1c9471c96890f3f74 <f032e125149d914e542548c17ebd613851031368

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=cfc80d9a11635404a40199a1c9471c96890f3f74 <105cc268328231d5c2bfcbd03f265cec444a3492; version=cfc80d9a11635404a40199a1c9471c96890f3f74 <2d5cebf57296f0189a61482035ad420384eedead; version=cfc80d9a11635404a40199a1c9471c96890f3f74 <44d250c22209c680f61befbc2ac326da5452da01; version=cfc80d9a11635404a40199a1c9471c96890f3f74 <c942f5cd63b7c2e73fe06744185a34b03267595b; version=cfc80d9a11635404a40199a1c9471c96890f3f74 <e3cbdcb0fbb61045ef3ce0e072927cc41737f787; version=cfc80d9a11635404a40199a1c9471c96890f3f74 <f032e125149d914e542548c17ebd613851031368

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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