PatchSiren

PatchSiren cyber security CVE debrief

CVE-2024-53226 Siemens CVE debrief

CVE-2024-53226 is a NULL pointer dereference vulnerability in the RDMA/hns driver, specifically within the hns_roce_map_mr_sg() function. The issue arises because ib_map_mr_sg() permits upper layer protocols to pass NULL as the sg_offset argument, and the driver fails to validate this before dereferencing. This vulnerability affects Siemens industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and multiple SCALANCE switch families. The CVSS 3.1 score of 5.5 (MEDIUM) reflects local attack vector, low attack complexity, and low privileges required, with high availability impact but no confidentiality or integrity impact. The vulnerability was published on August 12, 2025, with the advisory last modified on February 25, 2026. Siemens has provided vendor fixes, with updates to V3.2 or later versions recommended for affected products.

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 family devices in industrial control system environments. System administrators responsible for OT network infrastructure and security teams managing patch deployment for critical manufacturing or utility networks should prioritize assessment based on local access risk and availability requirements.

Technical summary

The vulnerability exists in the hns_roce_map_mr_sg() function of the RDMA/hns driver, which fails to check for NULL before dereferencing the sg_offset argument passed by ib_map_mr_sg(). Upper layer protocols can legitimately specify NULL for this parameter, creating a denial-of-service condition through local exploitation. The affected code path is in the memory registration handling for RDMA operations on Huawei RoCE (RDMA over Converged Ethernet) hardware integrated into Siemens industrial networking platforms.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided updates to V3.2 or later for affected RUGGEDCOM and SCALANCE products as specified in Siemens advisory
  • For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family deployments, consult Siemens ProductCERT advisory SSA-355557 for specific configuration guidance
  • Implement network segmentation for industrial control systems to limit local attack vector exposure
  • Monitor for anomalous local access attempts on affected devices pending patch deployment
  • Review and apply CISA ICS recommended practices for defense-in-depth strategies

Evidence notes

Vulnerability description and affected products confirmed through CISA CSAF advisory ICSA-25-226-07, which references Siemens ProductCERT advisory SSA-355557. CVSS vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H indicates local attack with availability impact only. Remediation guidance specifies V3.2 or later for RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 families; SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family requires vendor consultation per advisory details.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-53226 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-53226

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

  • CVE-2024-53226 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-53226

    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.