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PatchSiren cyber security CVE debrief

CVE-2024-35833 Siemens CVE debrief

A memory leak vulnerability in the Freescale (NXP) QDMA engine driver (fsl-qdma) within the Linux kernel. The flaw occurs in queue command DMA handling where allocated memory is not properly freed, leading to resource exhaustion over time. This affects Siemens industrial networking products running SINEC OS, which incorporates the vulnerable Linux kernel component. The vulnerability was resolved in the upstream Linux kernel with a fix for the memory leak related to queue command DMA operations.

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 using SCALANCE or RUGGEDCOM products with SINEC OS in critical infrastructure, manufacturing, or process control environments. ICS security teams responsible for patch management and vulnerability assessment in OT networks.

Technical summary

The vulnerability exists in the Freescale/NXP QDMA (Queue Direct Memory Access) engine driver (drivers/dma/fsl-qdma.c) in the Linux kernel. The flaw is a memory leak occurring during queue command DMA operations where allocated command structures are not properly deallocated after use. This can lead to gradual memory exhaustion in systems with heavy DMA utilization. The issue was resolved upstream with a fix that ensures proper cleanup of queue command DMA allocations. Siemens industrial networking products incorporating the vulnerable kernel component are affected, including SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family, and RUGGEDCOM RST2428P (6GK6242-6PA00) running SINEC OS.

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 when available
  • Monitor Siemens security advisories for SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family and RUGGEDCOM RST2428P
  • Implement network segmentation for industrial control systems per CISA recommended practices
  • Consider defense-in-depth strategies for ICS environments as referenced in CISA guidance

Evidence notes

The vulnerability description indicates a memory leak in the dmaengine: fsl-qdma driver specifically related to queue command DMA handling. The source advisory (ICSA-25-226-15) from CISA, republished based on Siemens ProductCERT SSA-613116, lists this CVE with threat category 'impact' marked as 'Misinformed' for affected product IDs. The advisory was initially published 2025-08-12 and most recently updated 2026-02-25 with corrections to affected products list and removal of rejected CVEs. Siemens ProductCERT references are provided for authoritative vendor guidance. No CVSS score or severity is available in the source corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-35833 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-35833

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

  • CVE-2024-35833 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-35833

    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.