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CVE-2024-46832 Siemens CVE debrief

A vulnerability in the Linux kernel's MIPS cevt-r4k timer driver could cause a BUG warning when get_c0_compare_int is called on secondary CPUs in invalid context. The issue stems from improper handling of timer IRQ installation during CPU bring-up, potentially triggering sleeping function warnings in mutex operations. Siemens has assessed this vulnerability as 'Misinformed' impact for affected industrial networking products, indicating the reported severity may not accurately reflect actual risk to operational environments. The vulnerability affects SINEC OS-based products including RUGGEDCOM RST2428P and SCALANCE X-family switches.

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 RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, or SCALANCE XCM-/XRM-/XCH-/XRH-300 family switches with SINEC OS should monitor vendor guidance, though vendor assessment indicates low operational risk.

Technical summary

The vulnerability exists in the MIPS cevt-r4k (R4000-class) clock event driver where get_c0_compare_int() is called during timer IRQ installation on secondary CPUs. This call occurs in an invalid context that can trigger a BUG warning for sleeping functions (specifically mutex operations at kernel/locking/mutex.c:283). The fix avoids calling get_c0_compare_int when the timer IRQ is already installed and removes unnecessary IRQ number storage in struct clock_event_device, which per kernel comments is only intended for non-CPU-local devices. Siemens has determined this vulnerability's impact is 'Misinformed' for affected products, suggesting the original CVE assessment does not accurately characterize risk to their industrial networking platforms.

Defensive priority

low

Recommended defensive actions

  • Review Siemens ProductCERT advisory SSA-355557 for current product-specific guidance
  • Verify SINEC OS version and applicable security patches through Siemens support channels
  • Monitor CISA ICS advisories for any updates to impact assessment
  • Apply defense-in-depth practices for industrial control systems per CISA guidance

Evidence notes

Source CISA CSAF advisory ICSA-25-226-07, republished 2026-02-25 based on Siemens ProductCERT SSA-355557. Siemens threat assessment categorizes impact as 'Misinformed' for all listed product IDs (CSAFPID-0006, CSAFPID-0002, CSAFPID-0003). No CVSS vector provided in source.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-46832 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-46832

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

  • CVE-2024-46832 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-46832

    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.