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PatchSiren cyber security CVE debrief

CVE-2024-35969 Siemens CVE debrief

A race condition vulnerability exists in the Linux kernel IPv6 networking subsystem between ipv6_get_ifaddr and ipv6_del_addr. The flaw could allow a local attacker to cause a denial of service condition. The vulnerability affects Siemens industrial networking products running SINEC OS, specifically the RUGGEDCOM RST2428P and SCALANCE X family switches. Siemens has released updates to address this issue.

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 operating Siemens industrial Ethernet switches in manufacturing, energy, transportation, and critical infrastructure sectors should prioritize patching. Security teams managing OT networks with IPv6-enabled devices and system administrators responsible for SCALANCE and RUGGEDCOM product lines need to assess exposure and apply updates.

Technical summary

CVE-2024-35969 is a race condition vulnerability in the Linux kernel's IPv6 address handling code, specifically between the ipv6_get_ifaddr and ipv6_del_addr functions. The flaw exists in the networking subsystem and can be triggered by a local attacker with low privileges. The vulnerability results in a denial of service condition with high availability impact. Affected products include Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family, and RUGGEDCOM RST2428P switches running SINEC OS. The CVSS 3.1 score of 5.5 reflects the local attack vector and availability impact. Siemens has addressed this vulnerability in SINEC OS V3.1 and later versions.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided updates to SINEC OS V3.1 or later for affected SCALANCE and RUGGEDCOM devices
  • Review network segmentation for industrial control systems to limit local access
  • Monitor for anomalous IPv6 traffic patterns on affected devices
  • Consult Siemens ProductCERT advisory SSA-613116 for detailed patch guidance

Evidence notes

The vulnerability is described as a race condition between ipv6_get_ifaddr and ipv6_del_addr in the IPv6 implementation. CISA published advisory ICSA-25-226-15 on 2025-08-12, with subsequent updates through 2026-02-25 to correct affected product listings and remove rejected CVEs. The CVSS 3.1 vector indicates local attack vector with low attack complexity, requiring low privileges and resulting in high availability impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-35969 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-35969

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

  • CVE-2024-35969 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-35969

    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-25-226-15.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-613116.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-613116.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-15

    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.