PatchSiren

PatchSiren cyber security CVE debrief

CVE-2023-52619 Siemens CVE debrief

A vulnerability in the Linux kernel's pstore/ram subsystem could cause system crashes when the number of CPUs is configured to an odd number. The issue has been resolved in the kernel. Siemens has identified this vulnerability as affecting certain industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE X-family switches. CISA published advisory ICSA-25-226-15 on August 12, 2025, with subsequent updates through February 25, 2026, to refine affected product listings and incorporate Siemens ProductCERT guidance. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.

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 SCALANCE X-family switches, RUGGEDCOM RST2428P devices, or other SINEC OS-based industrial networking equipment should prioritize assessment. OT security teams managing critical infrastructure networks, manufacturing environments, and utility control systems using these products need to evaluate exposure and coordinate patching with operational requirements.

Technical summary

The vulnerability exists in the Linux kernel's persistent storage (pstore) RAM backend. When the system is configured with an odd number of CPUs, the pstore/ram implementation can trigger a crash condition. This represents a denial-of-service vector that could impact system availability. The fix involves correcting the CPU count handling logic in the pstore/ram subsystem. Siemens industrial networking products utilizing affected kernel versions in SINEC OS are impacted, with specific product families identified in vendor advisories.

Defensive priority

medium

Recommended defensive actions

  • Review Siemens ProductCERT SSA-613116 for detailed product-specific patch guidance
  • Verify SINEC OS version on affected SCALANCE and RUGGEDCOM devices
  • Apply vendor-provided firmware updates to address the underlying kernel vulnerability
  • For systems where immediate patching is not feasible, assess CPU configuration as a potential temporary mitigation factor
  • Monitor CISA ICS advisories for additional guidance on industrial control system protections

Evidence notes

CVE description indicates kernel-level crash condition tied to CPU count configuration. Siemens ProductCERT SSA-613116 and CISA ICSA-25-226-15 identify affected industrial control system products. Source advisory revision history shows iterative corrections to product scope between February 12-25, 2026.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-52619 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-52619

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

  • CVE-2023-52619 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-52619

    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.