PatchSiren

PatchSiren cyber security CVE debrief

CVE-2024-38619 Siemens CVE debrief

CVE-2024-38619 is a medium-severity vulnerability (CVSS 5.5) in the Linux kernel's USB storage driver, specifically the Alauda media handling code. The flaw occurs when `alauda_init_media()` fails to initialize media, leaving the `uzonesize` member of `struct alauda_info` set to zero. This uninitialized value subsequently causes divide-by-zero errors in `alauda_read_data()` and `alauda_write_lba()` functions. While the underlying vulnerability exists in the Linux kernel's USB storage subsystem, this CVE was published in CISA's ICS advisory (ICSA-25-226-07) on August 12, 2025, as part of Siemens' third-party component security assessment for their SINEC OS and related industrial networking products. The advisory was subsequently modified on February 25, 2026, to reflect updates based on Siemens ProductCERT SSA-355557. Notably, the CISA advisory marks the impact as 'Misinformed' for the listed Siemens products, suggesting the vulnerability's applicability to these specific industrial control systems may be limited or incorrectly characterized in initial assessments. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, and no known ransomware campaign use has been documented. Organizations running affected Siemens industrial networking equipment should consult the vendor's security advisory for specific patch guidance and applicability to their deployed configurations.

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 running Siemens industrial networking products (SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family, RUGGEDCOM RST2428P) and Linux-based systems with USB-connected Alauda media should assess exposure. Industrial operators using USB storage in control system environments should prioritize this for defense-in-depth reviews.

Technical summary

The vulnerability exists in the Linux kernel's drivers/usb/storage/alauda.c where improper initialization checking leads to a divide-by-zero condition. When `alauda_init_media()` fails, `uzonesize` remains 0, causing division errors in subsequent read/write operations. This represents a classic CWE-20 (Improper Input Validation) issue in kernel driver code handling removable media.

Defensive priority

medium

Recommended defensive actions

  • Review Siemens ProductCERT security advisory SSA-355557 for specific product impact and patch availability
  • Verify kernel version on Linux-based industrial systems using USB storage with Alauda-based media
  • Apply vendor-provided firmware updates for affected Siemens SCALANCE and RUGGEDCOM products when available
  • Monitor CISA ICS advisories for updates to ICSA-25-226-07
  • Implement network segmentation for industrial control systems to limit exposure of USB-connected devices
  • Follow CISA recommended practices for industrial control systems defense in depth

Evidence notes

CVE published 2025-08-12 per CISA ICS advisory ICSA-25-226-07; modified 2026-02-25. Underlying vulnerability is Linux kernel usb-storage/alauda driver divide-by-zero. Advisory impact marked 'Misinformed' for listed Siemens products. Not in KEV.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-38619 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-38619

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

  • CVE-2024-38619 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-38619

    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.