CVE-2024-40942

Local denial of service via mesh queue leak

Published Jul 12, 2024 · Updated May 12, 2026

A mac80211 mesh resource leak in Linux and the Siemens SIMATIC S7-1500 TM MFP GNU/Linux subsystem allows local users to exhaust memory. The HWMP code queues mesh_preq_queue objects in ieee80211_if_mesh but fails to remove matching entries when mesh_path_flush_pending deletes a path or mesh interface. Exploitation requires low-privilege local access and an active mac80211 mesh configuration; repeated cleanup events can consume kernel memory until system availability is impaired.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A mac80211 mesh resource leak in Linux and the Siemens SIMATIC S7-1500 TM MFP GNU/Linux subsystem allows local users to exhaust memory. The HWMP code queues mesh_preq_queue objects in ieee80211_if_mesh but fails to remove matching entries when mesh_path_flush_pending deletes a path or mesh interface. Exploitation requires low-privilege local access and an active mac80211 mesh configuration; repeated cleanup events can consume kernel memory until system availability is impaired.

The record

CVE
CVE-2024-40942
Published
Jul 12, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-402, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e <377dbb220edc8421b7960691876c5b3bef62f89b; version=050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e <617dadbfb2d3e152c5753e28356d189c9d6f33c0; version=050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e <63d5f89bb5664d60edbf8cf0df911aaae8ed96a4; version=050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e <7518e20a189f8659b8b83969db4d33a4068fcfc3; version=050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e <b7d7f11a291830fdf69d3301075dd0fb347ced84; version=050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e <c4c865f971fd4a255208f57ef04d814c2ae9e0dc; version=050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e <d81e244af521de63ad2883e17571b789c39b6549; version=050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e <ec79670eae430b3ffb7e0a6417ad7657728b8f95; version=2.6.26

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-402Transmission of Private Resources into a New Sphere ('Resource Leak')
T1499.004Application or System Exploitation

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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