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PatchSiren cyber security CVE debrief

CVE-2024-26883 Siemens CVE debrief

A vulnerability in the Linux kernel's BPF (Berkeley Packet Filter) subsystem affects the stackmap overflow check on 32-bit architectures. The flaw could allow a local attacker with low privileges to cause a denial of service (system crash) due to an improper overflow check. Siemens has confirmed this vulnerability affects the GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP industrial control device. The vulnerability was published on April 9, 2024, and the advisory has been updated multiple times through September 2025 to include additional CVEs affecting the same product line. No patch is currently available from Siemens; mitigation relies on restricting access to trusted personnel and running only trusted applications.

Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2024-04-17
Original CVE updated
2026-08-04
Advisory published
2024-04-17
Advisory updated
2026-08-04

Who should care

Organizations operating Siemens SIMATIC S7-1500 TM MFP industrial control systems with the GNU/Linux subsystem enabled, particularly those in critical infrastructure sectors. System administrators responsible for securing OT/ICS environments and maintaining availability of industrial automation systems should prioritize access controls and monitoring for this vulnerability.

Technical summary

The vulnerability exists in the BPF subsystem's stackmap implementation on 32-bit architectures. An improper overflow check in the stackmap code path could be triggered by a local attacker with low privileges, resulting in a denial of service condition. The flaw is classified under CWE-20 (Improper Input Validation). The affected product is the SIMATIC S7-1500 TM MFP, specifically its GNU/Linux subsystem, which incorporates the vulnerable Linux kernel component. No firmware update is currently available to address this vulnerability.

Defensive priority

medium

Recommended defensive actions

  • Restrict interactive shell access to the GNU/Linux subsystem on affected SIMATIC S7-1500 TM MFP devices to trusted personnel only
  • Implement application whitelisting to ensure only trusted applications are built and executed on the GNU/Linux subsystem
  • Monitor for anomalous BPF-related activity or system crashes that could indicate exploitation attempts
  • Apply defense-in-depth strategies including network segmentation for industrial control systems per CISA recommended practices
  • Subscribe to Siemens ProductCERT security advisories for notification when a patch becomes available

Evidence notes

The vulnerability description is sourced from CISA CSAF advisory ICSA-24-102-01, which references Siemens security advisory SSA-265688. The CVSS vector (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) indicates local attack vector, low attack complexity, low privileges required, no user interaction, and high availability impact. The CWE-20 (Improper Input Validation) classification is referenced in the source advisory.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-26883 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-26883

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

  • CVE-2024-26883 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-26883

    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.