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PatchSiren cyber security CVE debrief

CVE-2024-39505 Siemens CVE debrief

CVE-2024-39505 is a vulnerability in the Linux kernel's Direct Rendering Manager (DRM) Komeda driver. The issue involves a missing null and error pointer check in `komeda_pipeline_get_state()`, which may return an error-valued pointer that could be dereferenced without validation. This vulnerability was published on August 12, 2025, and last modified on February 25, 2026. The vulnerability is present in Siemens industrial networking products that incorporate affected Linux kernel versions, specifically the RUGGEDCOM RST2428P and SCALANCE X-family switches running SINEC OS. CISA published advisory ICSA-25-226-07 on August 12, 2025, with subsequent updates through February 2026 to correct affected product listings and clarify configuration details. Siemens has issued ProductCERT advisory SSA-355557 to address this third-party component vulnerability in their affected products.

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 equipment, particularly RUGGEDCOM RST2428P switches and SCALANCE X-300/XR-300/XC-400/XR-500WG/XR-500 family devices running SINEC OS. OT security teams managing critical infrastructure networks, industrial automation engineers, and asset owners in manufacturing, energy, and transportation sectors where these devices are deployed should prioritize review of vendor guidance.

Technical summary

The vulnerability exists in the DRM Komeda display driver within the Linux kernel. The function `komeda_pipeline_get_state()` can return an error-valued pointer (negative error code cast to pointer or NULL), but the calling code may dereference this pointer without first checking for error or null conditions. This represents a CWE-20 (Improper Input Validation) weakness. The Komeda driver is used for ARM Mali display hardware and is incorporated into Siemens SINEC OS, which powers industrial networking equipment including RUGGEDCOM and SCALANCE product lines. Successful exploitation could lead to kernel memory corruption or denial of service conditions in affected industrial network infrastructure.

Defensive priority

medium

Recommended defensive actions

  • Review Siemens ProductCERT advisory SSA-355557 for detailed product-specific guidance and patch availability
  • Verify SINEC OS version on affected RUGGEDCOM RST2428P and SCALANCE X-family devices
  • Apply vendor-provided firmware updates when available per Siemens security advisory
  • For systems where patching is not immediately feasible, implement network segmentation to limit exposure of affected industrial switches
  • Monitor CISA ICS advisories for additional guidance on industrial control system security practices

Evidence notes

The vulnerability description indicates this is a kernel driver issue where `komeda_pipeline_get_state()` may return an error-valued pointer. The CISA CSAF advisory ICSA-25-226-07, published August 12, 2025, tracks this CVE as part of Siemens third-party components in SINEC OS. The advisory underwent three revisions: February 12, 2026 (corrected affected products), February 24, 2026 (clarified SCALANCE family configurations and removed rejected CVEs), and February 25, 2026 (CISA republication based on Siemens SSA-355557). The threat assessment in the source marks impact as 'Misinformed' for affected product IDs. No CVSS score is provided in the source data.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-39505 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-39505

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

  • CVE-2024-39505 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-39505

    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.