CVE-2024-36005

Service interruption via duplicate netfilter hook unregister

Published May 20, 2024 · Updated May 12, 2026

Improper input validation in Linux nf_tables allows local users to interrupt affected Linux and Siemens systems during netdev cleanup. The nf_tables_netdev_event path ignores a table's dormant flag and calls __nf_unregister_net_hook on a hook that was already unregistered. Low-privileged local access and an nf_tables netdev release event are required; successful triggering causes a kernel warning and loss of availability rather than data disclosure or modification.

CVSS severity5.5
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 input validation in Linux nf_tables allows local users to interrupt affected Linux and Siemens systems during netdev cleanup. The nf_tables_netdev_event path ignores a table's dormant flag and calls __nf_unregister_net_hook on a hook that was already unregistered. Low-privileged local access and an nf_tables netdev release event are required; successful triggering causes a kernel warning and loss of availability rather than data disclosure or modification.

The record

CVE
CVE-2024-36005
Published
May 20, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-20, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 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=5.5; version=d54725cd11a57c30f650260cfb0a92c268bdc3e0 <13ba94f6cc820fdea15efeaa17d4c722874eebf9; version=d54725cd11a57c30f650260cfb0a92c268bdc3e0 <5c45feb3c288cf44a529e2657b36c259d86497d2; version=d54725cd11a57c30f650260cfb0a92c268bdc3e0 <8260c980aee7d8d8a3db39faf19c391d2f898816; version=d54725cd11a57c30f650260cfb0a92c268bdc3e0 <8e30abc9ace4f0add4cd761dfdbfaebae5632dd2; version=d54725cd11a57c30f650260cfb0a92c268bdc3e0 <ca34c40d1c22c555fa7f4a21a1c807fea7290a0a; version=d54725cd11a57c30f650260cfb0a92c268bdc3e0 <e4bb6da24de336a7899033a65490ed2d892efa5b
Siemens · SCALANCE XCM/XRM/XCH/XRH-300 familyversion=0 <V3.1
Siemens · RUGGEDCOM RST2428Pversion=0 <V3.1

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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-20Improper Input Validation
T1499Endpoint Denial of Service

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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