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CVE-2024-43890 Siemens CVE debrief

CVE-2024-43890 is a MEDIUM severity vulnerability (CVSS 5.5) in the Linux kernel tracing subsystem, specifically an overflow in get_free_elt() that can lead to infinite loops and CPU hangs when the tracing map becomes full. The vulnerability was published on 2025-08-12 and last modified on 2026-02-25. Siemens has identified this vulnerability as affecting certain industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices. However, per the CISA advisory ICSA-25-226-07, the impact assessment for these products is marked as 'Misinformed,' indicating the vulnerability's applicability or impact may be limited or incorrectly characterized in the initial assessment. The vulnerability stems from improper input validation (CWE-20) in the kernel's tracing map implementation. Organizations should consult Siemens ProductCERT advisory SSA-355557 for definitive product-specific guidance and patch availability.

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 RUGGEDCOM RST2428P, SCALANCE XC/XR series, or other SINEC OS-based industrial networking equipment should monitor this advisory. Security teams in OT/ICS environments should prioritize vendor guidance from Siemens ProductCERT over initial CISA impact assessments given the 'Misinformed' classification.

Technical summary

An integer overflow in the Linux kernel's tracing subsystem function get_free_elt() can cause infinite loops and CPU hangs when the tracing map reaches capacity. The vulnerability is classified under CWE-20 (Improper Input Validation). Siemens industrial networking products running SINEC OS are identified as potentially affected, though the CISA advisory marks the impact as 'Misinformed,' suggesting the initial assessment may require correction or clarification. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.

Defensive priority

medium

Recommended defensive actions

  • Review Siemens ProductCERT advisory SSA-355557 for definitive product-specific impact assessment and patch guidance
  • Verify SINEC OS version and tracing subsystem configuration on affected Siemens devices
  • Apply vendor-provided firmware updates when available per Siemens security advisory
  • Monitor CISA ICS advisories for updates to impact assessment
  • Implement network segmentation for industrial control systems per CISA recommended practices
  • Review and apply CISA Defense in Depth strategies for ICS environments

Evidence notes

Vulnerability description sourced from CISA CSAF advisory ICSA-25-226-07. Impact assessment marked as 'Misinformed' per advisory threats section. Siemens ProductCERT SSA-355557 identified as authoritative source for remediation guidance. CVE published date 2025-08-12 used per timeline fields; modified date 2026-02-25 reflects CISA republication updates.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-43890 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-43890

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

  • CVE-2024-43890 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-43890

    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.