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PatchSiren cyber security CVE debrief

CVE-2024-56780 Siemens CVE debrief

This CVE addresses a Linux kernel quota subsystem issue where quota_release_work is not properly flushed during quota writeback operations. The vulnerability exists in the call path: freeze_super() → sync_filesystem() → ext4_sync_fs() → dquot_writeback_dquots(). This flaw could potentially lead to denial of service conditions during filesystem freeze operations on affected Siemens industrial networking products running SINEC OS. The issue was published on August 12, 2025, and the advisory was subsequently updated on February 25, 2026, to reflect corrections to affected product lists and clarifications on product configurations. Siemens has released firmware updates to address this vulnerability in affected RUGGEDCOM and SCALANCE product families.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
MEDIUM 4.7
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 industrial Ethernet switches or SCALANCE XC/XR/XCM/XRM/XCH/XRH industrial Ethernet switches in critical infrastructure environments, particularly those utilizing SINEC OS and requiring filesystem freeze operations for maintenance or backup procedures.

Technical summary

The vulnerability resides in the Linux kernel's disk quota implementation. During quota writeback triggered by filesystem freeze operations, the quota_release_work workqueue item may not be properly flushed, potentially causing synchronization issues. The affected call chain originates from freeze_super() through ext4_sync_fs() to dquot_writeback_dquots(). This is classified as CWE-833 (Deadlock) based on the advisory references. The CVSS 3.1 score of 4.7 (Medium) reflects local attack requirements and high complexity, with availability impact as the primary concern.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided firmware updates to V3.2 or later for affected RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices
  • For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, consult Siemens ProductCERT advisory SSA-355557 for specific configuration guidance and update availability
  • Implement network segmentation for industrial control systems to limit exposure of affected devices
  • Monitor vendor security advisories for additional product-specific guidance
  • Follow CISA ICS recommended practices for defense-in-depth strategies

Evidence notes

CVE description and affected product information sourced from CISA CSAF advisory ICSA-25-226-07, which references Siemens ProductCERT advisory SSA-355557. CVSS 3.1 vector AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H indicates local attack vector with high attack complexity, low privileges required, and high availability impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-56780 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-56780

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

  • CVE-2024-56780 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-56780

    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.