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PatchSiren cyber security CVE debrief

CVE-2024-50195 Siemens CVE debrief

A missing validation check in the Linux kernel's posix-clock subsystem allows local attackers to trigger a denial-of-service condition. The vulnerability exists in pc_clock_settime() where timespec64 values are not properly validated before use. An attacker with local access can exploit this to cause system instability or crashes.

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-300/XR-300/XC-400/XR-500WG/XR-500, or SCALANCE XCM-/XRM-/XCH-/XRH-300 industrial networking equipment in critical infrastructure environments, including energy, manufacturing, and transportation sectors.

Technical summary

The Linux kernel's posix-clock subsystem contains a vulnerability in pc_clock_settime() where timespec64 structure values are not validated before use. This missing check can be exploited by a local attacker with low privileges to cause a denial-of-service condition. The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) indicates local attack vector, low attack complexity, low privileges required, no user interaction, and high availability impact. The vulnerability affects Siemens industrial networking products including RUGGEDCOM RST2428P and SCALANCE switch families when running affected versions of SINEC OS.

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 instructions
  • Implement network segmentation to limit local access to affected industrial control systems
  • Monitor for anomalous system behavior or unexpected reboots on affected devices
  • Follow CISA ICS recommended practices for defense-in-depth strategies

Evidence notes

The vulnerability is documented in CISA ICS advisory ICSA-25-226-07, which was initially published on 2025-08-12 and subsequently updated on 2026-02-25 to reflect corrections to affected products and republication based on Siemens ProductCERT SSA-355557. The advisory identifies this as a Linux kernel posix-clock issue affecting Siemens industrial networking products running SINEC OS.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-50195 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-50195

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

  • CVE-2024-50195 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-50195

    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.