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CVE-2024-35955 Siemens CVE debrief

A use-after-free vulnerability in the Linux kernel's kprobes subsystem affects Siemens industrial networking products running SINEC OS. The flaw occurs during kprobe registration and could allow an attacker with local privileges to achieve code execution. Siemens has released updates to address this issue in affected SCALANCE and RUGGEDCOM devices.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
HIGH 8.8
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

Organizations operating Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family switches, RUGGEDCOM RST2428P devices, or other SINEC OS-based industrial networking equipment should prioritize this update. Critical infrastructure operators in manufacturing, energy, and transportation sectors relying on these devices for network segmentation and industrial communications are particularly affected.

Technical summary

CVE-2024-35955 is a use-after-free vulnerability in the Linux kernel's kprobes subsystem, specifically affecting kprobe registration. The flaw exists in code paths where kprobe structures may be accessed after being freed during registration operations. Siemens has identified this vulnerability as affecting SINEC OS, the operating system powering SCALANCE industrial Ethernet switches and RUGGEDCOM devices. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) indicates network attack vector with low attack complexity, requiring low privileges but no user interaction, with high impact to confidentiality, integrity, and availability. Siemens released firmware version 3.1 to remediate this vulnerability in affected product families. The CISA advisory revision history shows ongoing refinement of affected product lists, with corrections issued in February 2026 to accurately reflect impacted and non-impacted devices.

Defensive priority

HIGH

Recommended defensive actions

  • Apply vendor-provided firmware updates to V3.1 or later for affected SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices
  • Review Siemens ProductCERT advisory SSA-613116 for detailed patch availability and installation guidance
  • Implement network segmentation for industrial control systems per CISA ICS recommended practices
  • Monitor for anomalous privileged access attempts on affected devices pending patching
  • Validate that RUGGEDCOM RST2428P deployments follow vendor hardening guidance

Evidence notes

CVE published 2025-08-12 per CISA CSAF advisory ICSA-25-226-15. Advisory modified 2026-02-25 with republication based on Siemens ProductCERT SSA-613116. CVSS 8.8 (HIGH) per source. CWE-416 (Use After Free) identified. Not listed in CISA KEV.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-35955 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-35955

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

  • CVE-2024-35955 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-35955

    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-25-226-15.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-613116.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-613116.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-15

    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.