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PatchSiren cyber security CVE debrief

CVE-2024-26754 Siemens CVE debrief

A vulnerability in the Linux kernel's GTP (GPRS Tunneling Protocol) subsystem could allow use-after-free and null-pointer dereference conditions in the gtp_genl_dump_pdp() function. The issue has been resolved in the upstream Linux kernel. Siemens has assessed this vulnerability as affecting certain industrial networking products running SINEC OS, which incorporates the vulnerable Linux kernel component. The vulnerability was initially published on August 12, 2025, with subsequent advisory updates through February 25, 2026, including corrections to affected product listings and removal of rejected CVEs.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
Unknown
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 SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family, or RUGGEDCOM RST2428P industrial Ethernet switches in critical infrastructure environments. Network administrators responsible for telecommunications infrastructure using GTP protocol handling, and security teams managing OT/ICS environments with Linux-based network equipment should prioritize assessment.

Technical summary

The vulnerability exists in the gtp_genl_dump_pdp() function within the Linux kernel's GTP (GPRS Tunneling Protocol) netlink implementation. The function is responsible for dumping PDP (Packet Data Protocol) context information via the generic netlink interface. The identified issues include a use-after-free condition and a null-pointer dereference, both representing memory safety violations that could potentially lead to denial of service or information disclosure. The vulnerability has been resolved in upstream Linux kernel development. Siemens industrial networking products incorporating the affected kernel component are identified as vulnerable, with remediation dependent on vendor firmware updates incorporating the kernel fix.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided firmware updates for affected Siemens SCALANCE and RUGGEDCOM products when available
  • Verify SINEC OS version and confirm it incorporates the fixed Linux kernel GTP subsystem
  • For systems where patching is not immediately feasible, implement network segmentation to limit exposure of GTP protocol handlers
  • Monitor vendor security advisories from Siemens ProductCERT for additional product-specific guidance
  • Review Linux kernel changelogs for GTP subsystem fixes to confirm patch presence in deployed versions

Evidence notes

The source advisory indicates this vulnerability was resolved in the Linux kernel. The CISA CSAF advisory ICSA-25-226-15 underwent multiple revisions: initial publication (2025-08-12), correction of affected products (2026-02-12), removal of rejected CVEs (2026-02-24), and final republication based on Siemens SSA-613116 (2026-02-25). The threat assessment in the source marks impact as 'Misinformed' for affected product IDs.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-26754 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-26754

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

  • CVE-2024-26754 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-26754

    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.