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CVE-2024-35902 Siemens CVE debrief

CVE-2024-35902 is a medium-severity vulnerability (CVSS 5.5) in the Linux kernel's Reliable Datagram Sockets (RDS) subsystem, specifically affecting the `__rds_rdma_map` function where a null pointer dereference can occur. The parameter `cp` may be null, and calling `cp->cp_conn` without validation leads to a potential denial-of-service condition. This vulnerability was published on April 9, 2024, and affects Siemens SIMATIC S7-1500 TM MFP industrial control systems through their GNU/Linux subsystem. CISA and Siemens have issued coordinated advisories tracking this issue. No patch is currently available from the vendor.

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, OT security teams, Siemens SIMATIC S7-1500 TM MFP administrators, critical infrastructure security personnel, and organizations running Linux-based embedded systems in operational technology environments

Technical summary

The vulnerability exists in `net/rds` where the `cp` parameter in `__rds_rdma_map` may be null. When `cp->cp_conn` is dereferenced without null checking, a kernel panic or denial-of-service condition can occur. This is a local vulnerability requiring low privileges to exploit, with high availability impact but no confidentiality or integrity impact.

Defensive priority

medium

Recommended defensive actions

  • Restrict interactive shell access to the GNU/Linux subsystem on affected Siemens SIMATIC S7-1500 TM MFP devices to trusted personnel only
  • Only build and run applications from trusted sources on affected systems
  • Monitor for vendor security updates from Siemens for patch availability
  • Apply defense-in-depth strategies for industrial control systems per CISA guidance
  • Review network segmentation to limit exposure of affected industrial control devices

Evidence notes

The vulnerability description is sourced directly from CISA CSAF data and Siemens security advisories. The CVSS vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H indicates a local attack vector with low attack complexity, requiring low privileges, resulting in high availability impact with no confidentiality or integrity impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-35902 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-35902

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

  • CVE-2024-35902 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-35902

    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.