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PatchSiren cyber security CVE debrief

CVE-2024-42161 Siemens CVE debrief

CVE-2024-42161 is a HIGH-severity advisory published by CISA on 2025-03-11 for Siemens SIMATIC S7-1500 TM MFP - BIOS. The source corpus also identifies the underlying issue as a Linux kernel BPF_CORE_READ_BITFIELD uninitialized-value problem. CISA/Siemens state that no fix is currently available and recommend limiting the system to trusted software sources.

Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - BIOS
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2025-08-12
Original CVE updated
2026-02-25
Advisory published
2025-08-12
Advisory updated
2026-02-25

Who should care

OT/ICS operators, Siemens SIMATIC S7-1500 TM MFP users, engineering teams managing BIOS or application supply chains for this platform, and defenders responsible for Linux-based embedded components in industrial environments.

Technical summary

The source advisory maps CVE-2024-42161 to Siemens SIMATIC S7-1500 TM MFP - BIOS and gives a CVSS 3.1 vector of AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (7.8 HIGH). The CVE description states that the Linux kernel issue is an uninitialized-value bug in BPF_CORE_READ_BITFIELD. The corpus does not provide a device-specific exploitation path, only that the advisory currently has no available fix and advises building and running applications only from trusted sources.

Defensive priority

High

Recommended defensive actions

  • Restrict the platform to trusted, vetted applications and update channels only.
  • Monitor Siemens and CISA advisories for a vendor fix or updated mitigation guidance.
  • Review whether the affected BIOS/platform is exposed to untrusted local code execution paths or software supply-chain risks.
  • Apply compensating controls from CISA ICS recommended practices where feasible, including least privilege and application trust controls.

Evidence notes

Evidence is limited to the supplied CSAF advisory and linked official references. The advisory explicitly lists Siemens as the vendor, SIMATIC S7-1500 TM MFP - BIOS as the affected product, and states that no fix is available. The description field references a Linux kernel BPF_CORE_READ_BITFIELD uninitialized-value issue, but the corpus does not supply additional device-specific impact details, so no further exploitation claims are made.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-42161 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-42161

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

  • CVE-2024-42161 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-42161

    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/2025/icsa-25-072-03.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-503939.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-503939.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-072-03

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/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://us-cert.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.