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CVE-2024-27025 Siemens CVE debrief

A HIGH severity vulnerability (CVSS 8.8) in the Linux kernel's Network Block Device (nbd) subsystem affects Siemens SIMATIC S7-1500 TM MFP industrial controllers with GNU/Linux subsystem. The flaw involves a missing NULL check for nla_nest_start(), which may fail and return NULL, potentially leading to undefined behavior. Published 2024-04-09 and last modified 2026-05-14 per official CVE records. No patch is currently available from the vendor.

Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS
HIGH 8.8
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, OT security teams, and organizations deploying Siemens SIMATIC S7-1500 TM MFP controllers with GNU/Linux subsystem enabled. Critical infrastructure sectors including manufacturing, energy, and water/wastewater that rely on these controllers for process automation.

Technical summary

The vulnerability exists in the Linux kernel's Network Block Device (nbd) implementation where nla_nest_start() may fail and return NULL without proper validation. The missing NULL check could lead to undefined behavior when processing netlink attributes. This affects the GNU/Linux subsystem on Siemens SIMATIC S7-1500 TM MFP programmable logic controllers. The CVSS 3.1 score of 8.8 reflects network attack vector, low attack complexity, no privileges required, user interaction required, and high impacts to confidentiality, integrity, and availability.

Defensive priority

HIGH

Recommended defensive actions

  • Restrict interactive shell access to the GNU/Linux subsystem to trusted personnel only
  • Build and run only applications from trusted sources
  • Monitor for vendor security updates from Siemens CERT
  • Apply defense-in-depth controls per CISA ICS recommended practices
  • Segment industrial control networks from untrusted networks

Evidence notes

CVE published 2024-04-09; modified 2026-05-14. Source advisory ICSA-24-102-01 from CISA CSAF. Vendor confirmed as Siemens with product SIMATIC S7-1500 TM MFP - GNU/Linux subsystem. CVSS 3.1 vector: AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. No fix available per vendor remediation statement.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-27025 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-27025

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

  • CVE-2024-27025 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-27025

    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.