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CVE-2024-35930 Siemens CVE debrief

A memory leak vulnerability exists in the Linux kernel's Emulex LightPulse Fibre Channel (lpfc) driver, specifically within the lpfc_rcv_padisc() function. This flaw can lead to resource exhaustion and denial of service conditions on affected systems. The vulnerability was published on April 9, 2024, and affects Siemens SIMATIC S7-1500 TM MFP industrial control systems through their GNU/Linux subsystem. The CVSS 3.1 score of 5.5 (MEDIUM) reflects local attack vector requirements with low attack complexity and privileges, resulting in high availability impact. No known exploitation in the wild has been reported, and this vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.

Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2024-04-09
Original CVE updated
2026-05-14
Advisory published
2024-04-09
Advisory updated
2026-05-14

Who should care

Industrial control system operators using Siemens SIMATIC S7-1500 TM MFP with Fibre Channel connectivity; security teams managing OT/ICS environments; Linux kernel maintainers for lpfc driver deployments

Technical summary

The lpfc_rcv_padisc() function in the Emulex LightPulse Fibre Channel SCSI driver fails to properly free allocated memory under certain error conditions, resulting in a memory leak (CWE-401). This resource exhaustion vulnerability requires local access with low privileges to trigger. The affected code path processes PADISC (Port Address Discovery) ELS frames in Fibre Channel environments. On Siemens SIMATIC S7-1500 TM MFP systems, this vulnerability exists within the embedded GNU/Linux subsystem. No patch is currently available from Siemens as of the last advisory update.

Defensive priority

medium

Recommended defensive actions

  • Restrict interactive shell access to the GNU/Linux subsystem to trusted personnel only
  • Build and run applications exclusively from trusted sources
  • Monitor for abnormal memory consumption in lpfc driver operations
  • Apply vendor security updates when available for the SIMATIC S7-1500 TM MFP
  • Implement network segmentation for industrial control systems per CISA ICS recommended practices

Evidence notes

The vulnerability description is sourced from the Linux kernel commit message for the lpfc driver fix. Siemens confirmed affected products through their SSA-265688 security advisory. The CVSS vector (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) indicates local exploitation with availability impact only.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-35930 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-35930

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

  • CVE-2024-35930 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-35930

    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/2024/icsa-24-102-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-265688.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-265688.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-102-01

    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.