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CVE-2024-53145 Siemens CVE debrief

CVE-2024-53145 is a medium-severity integer overflow vulnerability in the Linux kernel's User-Mode Linux (UML) subsystem, specifically affecting the physical memory (physmem) setup process. The vulnerability occurs when the real map size exceeds LONG_MAX, which can be readily triggered on UML/i386 architectures. While this vulnerability originates in the Linux kernel, it affects Siemens industrial networking products that incorporate vulnerable kernel versions, including the RUGGEDCOM RST2428P and SCALANCE switch families (XC-300/XR-300/XC-400/XR-500WG/XR-500 and XCM-/XRM-/XCH-/XRH-300 families). The CVSS 3.1 score of 4.4 reflects local attack vector, low attack complexity, high privileges required, and high availability impact with no confidentiality or integrity impact. The vulnerability was published on August 12, 2025, with the advisory last modified on February 25, 2026, following republication based on Siemens ProductCERT SSA-355557. Siemens has provided vendor fixes, recommending updates to version 3.2 or later for affected products.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
MEDIUM 4.4
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 switches or SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 and XCM-/XRM-/XCH-/XRH-300 family switches in industrial environments. System administrators managing UML/i386 deployments should also assess exposure. Critical infrastructure operators following CISA ICS guidance should prioritize vendor firmware updates.

Technical summary

This vulnerability exists in the User-Mode Linux (UML) subsystem of the Linux kernel during physical memory setup. An integer overflow can occur when the real map size exceeds LONG_MAX, a condition easily triggered on UML/i386 architectures. The vulnerability has been incorporated into Siemens industrial networking products. Successful exploitation could lead to denial of service conditions due to the high availability impact, though exploitation requires local access and high privileges. The attack surface is limited by the local attack vector and privilege requirements.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided firmware updates to version 3.2 or later for affected Siemens RUGGEDCOM RST2428P and SCALANCE switch families
  • Review Siemens ProductCERT SSA-355557 for specific configuration guidance on SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family deployments
  • Implement defense-in-depth strategies for industrial control systems per CISA recommended practices
  • Monitor CISA ICS advisories for additional updates to this vulnerability
  • Verify kernel version in use on UML/i386 deployments and assess exposure to integer overflow conditions during physmem setup

Evidence notes

Vulnerability description and affected products confirmed through CISA CSAF advisory ICSA-25-226-07, which references Siemens ProductCERT SSA-355557. CVSS vector and remediation details extracted from source CSAF document. Timeline information derived from revision history showing initial publication 2025-08-12 and republication 2026-02-25.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-53145 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-53145

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

  • CVE-2024-53145 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-53145

    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.