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PatchSiren cyber security CVE debrief

CVE-2024-49952 Siemens CVE debrief

A vulnerability in the Linux kernel's netfilter nf_tables subsystem could allow corruption of nf_skb_duplicated data structures. This issue affects Siemens industrial networking products running SINEC OS, specifically the RUGGEDCOM RST2428P and SCALANCE X family switches. The vulnerability has been resolved in the upstream Linux kernel. Siemens has released firmware updates to address this issue in affected products.

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 or SCALANCE X family industrial Ethernet switches in critical infrastructure environments, including manufacturing, energy, transportation, and utility sectors. System administrators responsible for maintaining SINEC OS-based network infrastructure should prioritize firmware updates. Security teams monitoring OT/ICS environments for Linux kernel vulnerabilities affecting network stack components.

Technical summary

This vulnerability exists in the Linux kernel's netfilter nf_tables subsystem, which provides packet filtering and network address translation capabilities. The issue involves potential corruption of the nf_skb_duplicated data structure, which is used in packet processing operations. The vulnerability was resolved in the upstream Linux kernel. Siemens industrial networking products incorporating the affected Linux kernel versions are impacted, including RUGGEDCOM RST2428P switches and multiple SCALANCE X family product lines. The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) indicates a local attack vector with low attack complexity, requiring low privileges and resulting in high availability impact.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided firmware updates: Update RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices to firmware V3.2 or later. For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, consult Siemens' '
  • Additional Information' section in the security advisory for specific configuration guidance and update instructions.
  • Implement network segmentation for industrial control systems to limit exposure of affected devices.
  • Monitor for anomalous network behavior that could indicate exploitation attempts against nf_tables functionality.
  • Review and apply CISA's ICS recommended practices for defense-in-depth strategies.

Evidence notes

CVE published 2025-08-12 per official CVE record. Modified 2026-02-25. Source CISA CSAF advisory ICSA-25-226-07, republication based on Siemens ProductCERT SSA-355557. CVSS 5.5 (MEDIUM) per source. CWE-362 (Race Condition) indicated by source references.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-49952 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-49952

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

  • CVE-2024-49952 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-49952

    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.