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PatchSiren cyber security CVE debrief

CVE-2024-50188 Siemens CVE debrief

A memory corruption vulnerability exists in the DP83869 PHY driver within the Linux kernel networking subsystem. The flaw stems from an incorrect API usage where linkmode_set_bit() is called with a bit mask (1 << 10) instead of the expected bit number (10). This error causes memory corruption at an unintended location—specifically, on arm64 architectures, the priv pointer within the same structure is corrupted. The vulnerability is triggered when configuring the fiber port on affected devices.

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 industrial networking infrastructure including RUGGEDCOM RST2428P switches and SCALANCE XC/XR/XCM/XRM/XCH/XRH product families. System administrators managing SINEC OS deployments and OT security teams responsible for patch management in industrial environments should prioritize assessment and remediation.

Technical summary

The DP83869 PHY driver in the Linux kernel contains a memory corruption vulnerability triggered during fiber port configuration. The driver incorrectly passes a bit mask (1 << 10) to linkmode_set_bit() when the function expects a bit number (10). This type confusion results in out-of-bounds memory access, corrupting adjacent structure members including the priv pointer on arm64 systems. The vulnerability is classified as CWE-787 (Out-of-bounds Write). Exploitation requires local access with low privileges and can result in denial of service through availability impact.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided firmware updates to V3.2 or later for affected RUGGEDCOM and SCALANCE product families
  • For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices, consult Siemens ProductCERT advisory SSA-355557 for specific configuration guidance
  • Implement network segmentation to limit access to affected industrial control systems
  • Monitor for anomalous device behavior or unexpected reboots that may indicate exploitation attempts
  • Follow CISA ICS recommended practices for defense-in-depth strategies
  • Review and apply Siemens security advisories for SINEC OS and related third-party components

Evidence notes

The vulnerability description is sourced from CISA ICS Advisory ICSA-25-226-07, which references Siemens ProductCERT advisory SSA-355557. The flaw affects Siemens industrial networking products running SINEC OS that incorporate the vulnerable DP83869 PHY driver. The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) indicates a local attack vector with low attack complexity, requiring low privileges and no user interaction, resulting in high availability impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-50188 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-50188

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

  • CVE-2024-50188 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-50188

    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.