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CVE-2024-40971 Siemens CVE debrief

A race condition in the Linux kernel's F2FS filesystem during remount operations can cause files created or opened during a brief window to bypass inline encryption, potentially leading to data corruption when wrappedkey_v0 is enabled. The vulnerability stems from the SB_INLINECRYPT flag being temporarily cleared and re-set in f2fs_remount. Siemens has assessed this vulnerability as not affecting their listed industrial networking products, marking it as 'Misinformed' in their security advisory.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
HIGH 7.3
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 running Siemens industrial networking equipment (RUGGEDCOM RST2428P, SCALANCE XC/XR/XCM/XRM/XCH/XRH families) should verify their systems are not affected. Linux system administrators using F2FS with inline encryption enabled should monitor kernel security updates for the underlying vulnerability.

Technical summary

CVE-2024-40971 describes a race condition in the Linux kernel's F2FS (Flash-Friendly File System) where the SB_INLINECRYPT flag is cleared and re-set during f2fs_remount operations. If files are created or opened during this gap, they will not use inline encryption. In worst-case scenarios with wrappedkey_v0 enabled, this may lead to data corruption. Siemens has assessed this vulnerability as not affecting their listed industrial networking products (RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family), categorizing it as 'Misinformed' in their security advisory.

Defensive priority

low

Recommended defensive actions

  • Verify that affected Siemens industrial networking products (RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family) are running current firmware versions as no补丁
  • Follow CISA ICS recommended practices for defense-in-depth strategies for industrial control systems
  • Monitor Siemens ProductCERT advisories for any future reassessment of this vulnerability

Evidence notes

The source advisory (ICSA-25-226-07) explicitly marks CVE-2024-40971 as 'Misinformed' for all listed Siemens products, indicating the vulnerability does not affect these systems. The underlying Linux kernel issue involves a race condition in F2FS remount operations where the SB_INLINECRYPT flag is cleared and re-set, creating a window where files may be created without inline encryption.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-40971 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-40971

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

  • CVE-2024-40971 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-40971

    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.