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PatchSiren cyber security CVE debrief

CVE-2024-46782 Siemens CVE debrief

A use-after-free vulnerability exists in the Linux kernel's Identifier Locator Addressing (ILA) subsystem, specifically in the `ila_nf_input` function. The flaw occurs when `nf_unregister_net_hooks()` is called, leading to a use-after-free read condition. This vulnerability affects Siemens industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE switch families. The issue was disclosed in CISA advisory ICSA-25-226-07, which was republished on February 25, 2026, based on Siemens ProductCERT advisory SSA-355557. The vulnerability has a CVSS 3.1 score of 5.5 (MEDIUM severity) with a local attack vector, low attack complexity, and low privileges required. Successful exploitation results in high availability impact (denial of service) with no confidentiality or integrity impact. Siemens has provided vendor fixes: affected products should be updated to version 3.2 or later.

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 networking infrastructure, particularly those deploying RUGGEDCOM RST2428P switches or SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 and XCM-/XRM-/XCH-/XRH-300 family switches in industrial control system environments. Critical infrastructure operators, manufacturing facilities, and utility providers utilizing these devices for operational technology networks should prioritize assessment and patching.

Technical summary

The vulnerability exists in the Linux kernel's Identifier Locator Addressing (ILA) subsystem, a network namespace-aware IPv6 address mapping mechanism. The flaw is triggered when `nf_unregister_net_hooks()` is called during netfilter hook unregistration, resulting in a use-after-free read in `ila_nf_input`. This is a local vulnerability requiring low privileges with low attack complexity. The affected code path involves improper synchronization between netfilter hook teardown and ongoing packet processing in the ILA input path. Exploitation leads to denial of service through system instability or crash. The vulnerability is present in Siemens industrial networking products that incorporate the vulnerable Linux kernel components within SINEC OS.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided firmware updates to version 3.2 or later for affected Siemens RUGGEDCOM RST2428P and SCALANCE switch families
  • Review network segmentation for industrial control systems to limit exposure of affected devices
  • Monitor for anomalous network behavior or unexpected device reboots that may indicate exploitation attempts
  • Consult Siemens ProductCERT advisory SSA-355557 for specific configuration guidance regarding SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices
  • Follow CISA ICS recommended practices for defense-in-depth strategies for industrial control systems

Evidence notes

Vulnerability description and affected products confirmed through CISA CSAF advisory ICSA-25-226-07. CVSS vector and remediation details sourced from Siemens ProductCERT advisory SSA-355557 as referenced in CISA republication dated 2026-02-25.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-46782 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-46782

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

  • CVE-2024-46782 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-46782

    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.