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PatchSiren cyber security CVE debrief

CVE-2024-42114 Linux CVE debrief

CVE-2024-42114 is a medium-severity vulnerability (CVSS 3.1: 4.4) in the Linux kernel's cfg80211 wireless configuration subsystem. The flaw involves improper restriction of NL80211_ATTR_TXQ_QUANTUM values, which can lead to denial of service conditions. The vulnerability was published on April 9, 2024, and affects Siemens SIMATIC S7-1500 TM MFP industrial control systems through their GNU/Linux subsystem. No fix is currently available from the vendor. The vulnerability requires local access and high privileges to exploit, limiting its attack surface but maintaining relevance for multi-user or compromised-device scenarios in industrial environments.

Vendor
Linux
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS
MEDIUM 4.4
CISA KEV
Not listed in stored evidence
Original CVE published
2024-04-09
Original CVE updated
2026-05-14
Advisory published
2024-04-09
Advisory updated
2026-05-14

Who should care

Industrial control system operators using Siemens SIMATIC S7-1500 TM MFP with the GNU/Linux subsystem enabled; OT security teams managing wireless-enabled industrial devices; asset owners awaiting vendor patches for embedded Linux components; compliance teams tracking unpatched medium-severity CVEs in critical infrastructure environments.

Technical summary

The vulnerability exists in the cfg80211 subsystem of the Linux kernel, which provides the configuration interface for wireless devices. The NL80211_ATTR_TXQ_QUANTUM attribute, used for configuring transmit queue quantum values in wireless traffic scheduling, lacks proper input validation. An attacker with local access and high privileges (typically root or CAP_NET_ADMIN) can supply malformed or out-of-range quantum values that cause resource exhaustion, scheduling failures, or kernel instability. The CVSS vector (AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H) indicates this is a local attack requiring high privileges, with availability impact as the primary concern. No confidentiality or integrity impacts are associated. The flaw is classified under CWE-667 (Improper Locking) based on reference data.

Defensive priority

medium

Recommended defensive actions

  • Restrict interactive shell access to the GNU/Linux subsystem to trusted personnel only
  • Implement application allowlisting: build and run only from trusted sources
  • Monitor for anomalous local privilege escalation attempts on affected devices
  • Apply defense-in-depth controls per ICS-CERT recommended practices pending vendor patch
  • Review network segmentation to limit lateral movement from compromised endpoints

Evidence notes

CVE published 2024-04-09 per official CVE record. CISA CSAF advisory ICSA-24-102-01 published same date. Siemens SSA-265688 cross-referenced. CVSS vector AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H confirms local attack vector with high privilege requirement, no confidentiality or integrity impact, high availability impact. No KEV listing. No known ransomware campaign use documented.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-42114 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-42114

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-42114 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-42114

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-102-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-265688.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-265688.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-102-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.