CVE-2024-39492

Spurious kernel warning via valid runtime-PM return

Published Jul 10, 2024 · Updated May 11, 2026

Unchecked return handling in Linux 6.7 through 6.9.3 allows local users to reach a warning in the mtk-cmdq mailbox shutdown path. cmdq_mbox_shutdown() passes pm_runtime_get_sync() directly to WARN_ON(), so a valid positive return for an active runtime-PM state is treated as an error. Reachability requires the MediaTek CMDQ shutdown path to run while runtime PM is active; the CNA documents a warning, not a crash or data compromise.

CVSS severity7.0
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unchecked return handling in Linux 6.7 through 6.9.3 allows local users to reach a warning in the mtk-cmdq mailbox shutdown path. cmdq_mbox_shutdown() passes pm_runtime_get_sync() directly to WARN_ON(), so a valid positive return for an active runtime-PM state is treated as an error. Reachability requires the MediaTek CMDQ shutdown path to run while runtime PM is active; the CNA documents a warning, not a crash or data compromise.

The record

CVE
CVE-2024-39492
Published
Jul 10, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-252
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 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=6.7
  2. Affected versionversion=8afe816b0c9944a11adb12628e3b700a08a55d52 <2d42a37a4518478f075ccf848242b4a50e313a46
  3. Affected versionversion=8afe816b0c9944a11adb12628e3b700a08a55d52 <747a69a119c469121385543f21c2d08562968ccc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=8afe816b0c9944a11adb12628e3b700a08a55d52 <2d42a37a4518478f075ccf848242b4a50e313a46; version=8afe816b0c9944a11adb12628e3b700a08a55d52 <747a69a119c469121385543f21c2d08562968ccc

Published CVSS scores

7.0CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

CWE-252Unchecked Return Value

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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