PatchSiren

PatchSiren cyber security CVE debrief

CVE-2024-42077 Siemens CVE debrief

CVE-2024-42077 describes a vulnerability in the ocfs2 filesystem where Direct I/O (DIO) operations fail due to insufficient transaction credits. The vulnerability was originally published on 2025-08-12 and last modified on 2026-02-25. According to the source advisory, this CVE was included in a CISA ICS advisory (ICSA-25-226-07) covering Siemens Third-Party Components in SINEC OS. However, the threat assessment in the source material categorizes the impact for affected product IDs as 'Misinformed,' indicating this CVE may have been incorrectly attributed to certain Siemens products. The advisory underwent multiple revisions, with the most significant update on 2026-02-25 when CISA republished based on Siemens ProductCERT SSA-355557. Notably, this CVE was not rejected in the 2026-02-24 revision that removed multiple other rejected CVEs from the advisory. The vulnerability affects Linux kernel's ocfs2 filesystem implementation, not Siemens proprietary code directly—hence its classification as a third-party component issue. No CVSS score or severity is available in the source data.

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 network devices including RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, and SCALANCE XCM-/XRM-/XCH-/XRH-300 family should verify their exposure. System administrators managing Linux-based industrial control systems using ocfs2 should monitor for kernel updates. Security teams tracking third-party component vulnerabilities in OT/ICS environments should review the Siemens ProductCERT guidance.

Technical summary

The ocfs2 (Oracle Cluster File System 2) Linux kernel module contains a vulnerability where Direct I/O operations fail due to insufficient transaction credits being allocated. This affects filesystem operations that bypass the page cache for performance-critical applications. The vulnerability exists in the third-party Linux kernel component used by Siemens SINEC OS and related industrial network infrastructure products. The source advisory's 'Misinformed' threat categorization suggests potential discrepancies in initial product impact assessment that were subsequently clarified in the 2026-02-25 republication.

Defensive priority

medium

Recommended defensive actions

  • Review Siemens ProductCERT advisory SSA-355557 for definitive product impact assessment
  • Verify ocfs2 filesystem usage in deployed Siemens industrial network devices
  • Apply Linux kernel updates addressing ocfs2 transaction credit allocation when available from Siemens
  • Monitor CISA ICS advisories for updates to ICSA-25-226-07
  • Implement defense-in-depth strategies per CISA ICS recommended practices for industrial control systems

Evidence notes

Source indicates 'Misinformed' impact categorization for product IDs CSAFPID-0006, CSAFPID-0002, and CSAFPID-0003. CVE retained in advisory after 2026-02-24 cleanup of rejected CVEs. Advisory republished 2026-02-25 based on Siemens SSA-355557.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-42077 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-42077

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

  • CVE-2024-42077 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-42077

    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.