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PatchSiren cyber security CVE debrief

CVE-2023-52855 Siemens CVE debrief

A NULL pointer dereference vulnerability in the Linux kernel's USB DWC2 (DesignWare Core 2) driver, triggered by driver concurrency conditions. The vulnerability was resolved in the Linux kernel with a fix for the race condition. Siemens has identified this CVE as affecting certain industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE X-family switches. The CISA CSAF advisory ICSA-25-226-15 (published 2025-08-12, updated 2026-02-25) tracks this vulnerability with multiple revisions correcting affected product listings and removing rejected CVEs. No CVSS score is currently assigned in the source data.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
Unknown
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 those with RUGGEDCOM RST2428P or SCALANCE X-series switches in critical infrastructure environments. OT security teams managing SINEC OS deployments should prioritize firmware updates.

Technical summary

The vulnerability exists in the USB DWC2 (DesignWare Core 2) host controller driver within the Linux kernel. A race condition between concurrent driver operations can lead to a NULL pointer dereference, potentially causing system instability or denial of service. The fix addresses the driver concurrency issue to prevent the dereference. This kernel component is used in Siemens SINEC OS, which powers industrial networking equipment including RUGGEDCOM RST2428P and SCALANCE X-family switches (XC-300/XR-300/XC-400/XR-500WG/XR-500, XCM-/XRM-/XCH-/XRH-300 families).

Defensive priority

medium

Recommended defensive actions

  • Review Siemens ProductCERT advisory SSA-613116 for affected product versions and patch availability
  • Apply vendor-provided firmware updates for SINEC OS on affected SCALANCE and RUGGEDCOM devices
  • Verify USB DWC2 driver configurations on embedded Linux systems using this kernel component
  • Monitor CISA ICS advisories for additional guidance on industrial control system protections

Evidence notes

Source: CISA CSAF advisory ICSA-25-226-15, derived from Siemens ProductCERT SSA-613116. The advisory underwent four revisions: initial publication (2025-08-12), corrected affected products (2026-02-12), removed rejected CVEs and unsupported version notes (2026-02-24), and final CISA republication based on Siemens advisory (2026-02-25).

Sources and references

Verified primary and authoritative sources

  • CVE-2023-52855 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-52855

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

  • CVE-2023-52855 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-52855

    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.