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PatchSiren cyber security CVE debrief

CVE-2024-50184 Siemens CVE debrief

A vulnerability in the virtio_pmem driver could allow a local attacker to cause a denial-of-service condition. The flaw exists because the driver fails to check device status before requesting a flush operation. If a pmem device enters a bad state, the driver may wait indefinitely for host acknowledgment in virtio_pmem_flush(), resulting in a system hang. This vulnerability affects Siemens industrial networking products running SINEC OS, specifically the RUGGEDCOM RST2428P and SCALANCE switch families. The issue was published on August 12, 2025, with the advisory last modified on February 25, 2026, to clarify affected product configurations and remove rejected CVEs. Siemens has released firmware updates to address this vulnerability.

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 switches or SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 and XCM-/XRM-/XCH-/XRH-300 family switches in industrial environments. System administrators responsible for OT network infrastructure, particularly those managing virtualized environments using virtio_pmem devices. Security teams monitoring for local denial-of-service conditions in industrial control systems.

Technical summary

The virtio_pmem driver in the Linux kernel does not verify device status before initiating flush operations. When a pmem device reports a bad status, the driver enters virtio_pmem_flush() and waits indefinitely for host acknowledgment that never arrives, causing a complete system hang. This represents a classic missing validation check (CWE-20) in driver-device communication protocols. The vulnerability requires local access with low privileges and has been assigned CVSS 3.1 score 5.5 (Medium). Affected Siemens products incorporate this vulnerable component in their SINEC OS firmware. Remediation involves updating to firmware version 3.2 or later, which includes the corrected driver implementation with proper device status verification before flush requests.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided firmware updates to V3.2 or later for affected RUGGEDCOM and SCALANCE products
  • For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, consult Siemens ProductCERT advisory SSA-355557 for specific configuration guidance
  • Implement network segmentation for industrial control systems to limit local access
  • Follow CISA ICS recommended practices for defense-in-depth strategies
  • Monitor vendor security advisories for additional affected product announcements

Evidence notes

The vulnerability description is drawn from the CISA CSAF advisory ICSA-25-226-07, which references Siemens ProductCERT advisory SSA-355557. The affected products are confirmed through the CSAF product tree with high confidence. CVSS 3.1 vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H indicates local attack vector with low attack complexity, requiring low privileges, resulting in high availability impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-50184 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-50184

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

  • CVE-2024-50184 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-50184

    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.