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CVE-2025-38280 Siemens CVE debrief

CVE-2025-38280 is a Linux kernel BPF/JIT handling issue surfaced in Siemens’s SIMATIC S7-1500 CPU family advisory. The problem can cause the kernel to wrongly accept a program after JIT compilation fails, and later trigger a WARN_ON_ONCE when the program runs. The source advisory rates it HIGH (CVSS 7.8) and lists no fixed version at publication time, so affected operators should treat it as a compensating-control priority.

Vendor
Siemens
Product
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2025-06-10
Original CVE updated
2026-05-14
Advisory published
2025-06-10
Advisory updated
2026-05-14

Who should care

OT operators, Siemens SIMATIC S7-1500 owners, embedded Linux administrators, and security teams responsible for industrial control environments where local access to the affected device or subsystem is possible.

Technical summary

The advisory describes a Linux kernel BPF path where fp->jit_requested depends on bpf_jit_enable. When CONFIG_BPF_JIT_ALWAYS_ON is not set and bpf_jit_enable is 1, the architecture may attempt JIT compilation; if JIT fails (the advisory cites FAULT_INJECTION), the program can be incorrectly treated as valid. When executed, it reaches __bpf_prog_ret0_warn and raises WARN_ON_ONCE(1). The documented CVSS vector is local, low-complexity, low-privilege, no-user-interaction, with high confidentiality, integrity, and availability impact in the source record.

Defensive priority

High

Recommended defensive actions

  • Apply Siemens and CISA guidance for the affected SIMATIC S7-1500 products and track the Siemens ProductCERT advisory for updates.
  • Restrict access to the interactive shell of the affected GNU/Linux subsystem to trusted personnel only, as stated in the source remediation guidance.
  • Only build and run applications from trusted sources on affected systems, as stated in the source remediation guidance.
  • Use compensating controls from CISA industrial control systems recommended practices while no fix is available.
  • Limit local access paths and review whether BPF/JIT-related configuration can be reduced or controlled in the deployed environment, consistent with vendor support guidance.

Evidence notes

Timing context is based on the supplied advisory dates, not generation time: first published 2025-06-10 and last updated 2026-05-14. The source item is CISA’s CSAF advisory ICSA-25-162-05, which references Siemens ProductCERT SSA-082556 and lists five affected Siemens SIMATIC S7-1500 CPU family products. The advisory also states that no fix is currently available. KEV is not listed for this CVE in the supplied corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-38280 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-38280

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

  • CVE-2025-38280 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-38280

    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-25-162-05.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-082556.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-082556.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-162-05

    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.