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PatchSiren cyber security CVE debrief

CVE-2024-50014 Linux CVE debrief

A vulnerability in the Linux kernel has been resolved, which could potentially lead to a denial-of-service (DoS) attack if exploited. The issue arises from an uninitialized lock in the fast-commit feature of the ext4 filesystem. This vulnerability can be triggered by running the fstest generic/629 test on a filesystem with the fast-commit feature enabled. System administrators and security teams should assess their exposure and take necessary mitigations. The vulnerability has a CVSS score of 5.5, indicating medium severity.

Vendor
Linux
Product
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-28
Advisory published
2026-07-14
Advisory updated
2026-07-28

Who should care

System administrators and security teams responsible for Linux-based systems, especially those using the ext4 filesystem with the fast-commit feature enabled, should assess their exposure and take necessary mitigations.

Why it matters

The uninitialized lock in the ext4 filesystem's fast-commit feature could lead to a denial-of-service (DoS) attack if exploited. System administrators and security teams should assess their exposure and take necessary mitigations.

  • Denial-of-service (DoS) attack potential
  • Local access required for exploitation
  • CVSS score of 5.5 indicates medium severity

Technical summary

The vulnerability is caused by an uninitialized lock in the ext4 filesystem's fast-commit feature. This can be triggered by running the fstest generic/629 test on a filesystem with the fast-commit feature enabled. The issue has been resolved in the Linux kernel. The vulnerability requires local access and has a CVSS score of 5.5, indicating medium severity. The affected product is the Linux kernel, and the vulnerability is classified as a denial-of-service (DoS) attack. The source-grounded technical framing indicates that the vulnerability is caused by an uninitialized lock, which can lead to a DoS attack if exploited.

Defensive priority

Medium priority, as the vulnerability requires local access and has a CVSS score of 5.5.

Recommended defensive actions

  • Review and apply the provided mitigations, such as limiting access to the interactive shell and building applications from trusted sources.
  • Monitor system logs for potential exploitation attempts.
  • Consider upgrading to a fixed version of the Linux kernel when available.
  • Perform a thorough review of the affected systems and apply patches as necessary.
  • Implement compensating controls to mitigate the risk of exploitation.
  • Conduct regular security audits to identify potential vulnerabilities.
  • Track exceptions and retest remediated assets to ensure the vulnerability is fully resolved.

Evidence notes

The vulnerability is caused by an uninitialized lock in the ext4 filesystem's fast-commit feature. This can be triggered by running the fstest generic/629 test on a filesystem with the fast-commit feature enabled.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-50014 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-50014

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

  • CVE-2024-50014 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-50014

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • CVE-2024-50014

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-209-04.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-019113.json

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-019113.html

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-209-04

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Supplemental source

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.