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PatchSiren cyber security CVE debrief

CVE-2024-46744 Siemens CVE debrief

A vulnerability in the Linux kernel's Squashfs filesystem implementation, affecting symbolic link handling, has been resolved. The issue involved insufficient validation of symbolic link sizes, which could lead to denial of service conditions. Siemens has identified this vulnerability as affecting multiple industrial networking product families that incorporate the vulnerable Linux kernel component. The vulnerability was published on August 12, 2025, with subsequent advisory updates through February 25, 2026, including corrections to affected product listings and clarifications regarding specific product family configurations.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
MEDIUM 5.5
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

Organizations operating Siemens industrial networking infrastructure, particularly in critical infrastructure and manufacturing environments. System administrators responsible for RUGGEDCOM and SCALANCE device fleets. OT security teams managing firmware lifecycle for industrial control systems. Compliance officers tracking CVE remediation for NERC CIP, IEC 62443, or similar industrial cybersecurity frameworks. Siemens partners and integrators deploying affected product families in customer environments.

Technical summary

The vulnerability exists in the Linux kernel's Squashfs filesystem driver, specifically in the handling of symbolic link sizes. The resolution implements proper sanity checking of symbolic link size values to prevent potential denial of service conditions. The CVSS v3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) indicates a local attack vector where an attacker with low privileges could cause high availability impact without user interaction. The vulnerability is classified under CWE-908 (Use of Uninitialized Resource). Affected Siemens products include RUGGEDCOM RST2428P (6GK6242-6PA00), SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, and SCALANCE XCM-/XRM-/XCH-/XRH-300 family, which incorporate the vulnerable Linux kernel component in their firmware.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided firmware updates to V3.2 or later for affected RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices
  • For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, consult Siemens ProductCERT advisory SSA-355557 for specific configuration guidance and update availability
  • Implement network segmentation for industrial control systems to limit exposure of affected devices
  • Monitor Siemens ProductCERT security advisories for additional update guidance
  • Follow CISA ICS recommended practices for defense-in-depth strategies
  • resourceLinkAnnotations: [ref-4, ref-5, ref-6, ref-8, ref-10]

Evidence notes

CVE published 2025-08-12; modified 2026-02-25. Source advisory ICSA-25-226-07 underwent four revisions, with significant updates on 2026-02-12 (product list corrections), 2026-02-24 (configuration clarifications and rejected CVE removals), and 2026-02-25 (CISA republication based on Siemens SSA-355557). CVSS 5.5 (MEDIUM) with vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H indicates local attack vector with low attack complexity, requiring low privileges, resulting in high availability impact. CWE-908 (Use of Uninitialized Resource) referenced.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-46744 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-46744

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

  • CVE-2024-46744 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-46744

    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-25-226-07.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-355557.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-355557.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-07

    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.