CVE-2024-42070

Service interruption via unvalidated nftables register stores

Published Jul 29, 2024 · Updated May 12, 2026

Improper data validation in Linux kernel nf_tables allows local users to interrupt service through crafted nftables set lookups. The register-store path conditionally skips NFT_DATA_VALUE validation, allowing nft_lookup to place a chain-object pointer in a data register. Low-privileged local access is required, and public records do not specify whether the resulting availability loss is a hang, crash, or other interruption.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper data validation in Linux kernel nf_tables allows local users to interrupt service through crafted nftables set lookups. The register-store path conditionally skips NFT_DATA_VALUE validation, allowing nft_lookup to place a chain-object pointer in a data register. Low-privileged local access is required, and public records do not specify whether the resulting availability loss is a hang, crash, or other interruption.

The record

CVE
CVE-2024-42070
Published
Jul 29, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 29, 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=V3.1.0 <V3.1.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.0 <V3.1.5
Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=3.13; version=96518518cc417bb0a8c80b9fb736202e28acdf96 <23752737c6a618e994f9a310ec2568881a6b49c4; version=96518518cc417bb0a8c80b9fb736202e28acdf96 <40188a25a9847dbeb7ec67517174a835a677752f; version=96518518cc417bb0a8c80b9fb736202e28acdf96 <41a6375d48deaf7f730304b5153848bfa1c2980f; version=96518518cc417bb0a8c80b9fb736202e28acdf96 <461302e07f49687ffe7d105fa0a330c07c7646d8; version=96518518cc417bb0a8c80b9fb736202e28acdf96 <5d43d789b57943720dca4181a05f6477362b94cf; version=96518518cc417bb0a8c80b9fb736202e28acdf96 <7931d32955e09d0a11b1fe0b6aac1bfa061c005c; version=96518518cc417bb0a8c80b9fb736202e28acdf96 <952bf8df222599baadbd4f838a49c4fef81d2564; version=96518518cc417bb0a8c80b9fb736202e28acdf96 <efb27ad05949403848f487823b597ed67060e007
Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPversion=V3.1.0 <V3.1.5
Siemens · SCALANCE XCM/XRM/XCH/XRH-300 familyversion=0 <V3.1
Siemens · RUGGEDCOM RST2428Pversion=0 <V3.1
Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.0 <V3.1.5

Published CVSS scores

5.5NISTCVSS: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.

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-401Missing Release of Memory after Effective Lifetime
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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