CVE-2024-36007

Kernel disruption via stale ACL rehash markers

Published May 20, 2024 · Updated Aug 5, 2026

Improper input validation in Linux mlxsw ACL rehashing allows local users to disrupt kernel availability through inconsistent migration state. On an error, the rehash worker clears its chunk marker but retains entry markers relative to the old chunk, so resumed work treats an unrelated chunk as an entry. Reachability requires a Mellanox Spectrum device using mlxsw and an ACL-region rehash that exhausts its credits and then encounters an error.

CVSS severity7.8
High
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 mlxsw ACL rehashing allows local users to disrupt kernel availability through inconsistent migration state. On an error, the rehash worker clears its chunk marker but retains entry markers relative to the old chunk, so resumed work treats an unrelated chunk as an entry. Reachability requires a Mellanox Spectrum device using mlxsw and an ACL-region rehash that exhausts its credits and then encounters an error.

The record

CVE
CVE-2024-36007
Published
May 20, 2024
Updated
Aug 5, 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. Aug 5, 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=5.1; version=6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf <039992b6d2df097c65f480dcf269de3d2656f573; version=6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf <0b88631855026b55cad901ac28d081e0f358e596; version=6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf <17e9e0bbae652b9b2049e51699e93dfa60b2988d; version=6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf <1d76bd2a0034d0d08045c1c6adf2235d88982952; version=6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf <743edc8547a92b6192aa1f1b6bb78233fa21dc9b; version=6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf <751d352858108314efd33dddd5a9a2b6bf7d6916; version=6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf <e890456051fe8c57944b911defb3e6de91315861
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
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5CISA-ADPCVSS: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.

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Technologies

Your stack

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Your stack

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