CVE-2024-56609

Kernel warning via incomplete TX queue purge

Published Dec 27, 2024 · Updated May 11, 2026

Improper TX queue cleanup in Linux 5.2 and later allows local users with administrative privileges to trigger a kernel warning. The rtw88 SDIO and USB removal paths call skb_queue_purge(), which discards pending transmit buffers without reporting their TX status, leaving pending acknowledgment frames. Reaching the flaw requires permission to remove an affected rtw88 module and relevant wireless hardware; the published trace demonstrates a warning, not a kernel crash.

CVSS severity4.4
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper TX queue cleanup in Linux 5.2 and later allows local users with administrative privileges to trigger a kernel warning. The rtw88 SDIO and USB removal paths call skb_queue_purge(), which discards pending transmit buffers without reporting their TX status, leaving pending acknowledgment frames. Reaching the flaw requires permission to remove an affected rtw88 module and relevant wireless hardware; the published trace demonstrates a warning, not a kernel crash.

The record

CVE
CVE-2024-56609
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.2
  2. Affected versionversion=e3037485c68ec1a299ff41160d8fedbd4abc29b9 <3d94c4b21966b49c3e26ceeefacaa11ff7ee6d68
  3. Affected versionversion=e3037485c68ec1a299ff41160d8fedbd4abc29b9 <3e5e4a801aaf4283390cc34959c6c48f910ca5ea
  4. Affected versionversion=e3037485c68ec1a299ff41160d8fedbd4abc29b9 <4e8ce3978d704cb28678355d294e10a008b6230a
  5. Affected versionversion=e3037485c68ec1a299ff41160d8fedbd4abc29b9 <9bca6528f20325d30c22236b23116f161d418f6d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=e3037485c68ec1a299ff41160d8fedbd4abc29b9 <3d94c4b21966b49c3e26ceeefacaa11ff7ee6d68; version=e3037485c68ec1a299ff41160d8fedbd4abc29b9 <3e5e4a801aaf4283390cc34959c6c48f910ca5ea; version=e3037485c68ec1a299ff41160d8fedbd4abc29b9 <4e8ce3978d704cb28678355d294e10a008b6230a; version=e3037485c68ec1a299ff41160d8fedbd4abc29b9 <9bca6528f20325d30c22236b23116f161d418f6d

Published CVSS scores

4.4OracleCVSS:3.1/AV:L/AC:L/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

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
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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