PatchSiren

PatchSiren cyber security CVE debrief

CVE-2024-27076 Siemens CVE debrief

CVE-2024-27076 is a memory leak vulnerability in the Linux kernel's media subsystem, specifically within the i.MX CSC/scaler driver. The issue occurs when memory allocated via v4l2_ctrl_handler_init is not properly freed on release, leading to resource exhaustion over time. This vulnerability affects Siemens SIMATIC S7-1500 TM MFP industrial control systems that utilize the GNU/Linux subsystem. The CVSS 3.1 score of 8.8 (HIGH) reflects network attack vector, low attack complexity, no privileges required, user interaction required, and high impacts to confidentiality, integrity, and availability. The vulnerability was published on April 9, 2024, and the advisory has been updated multiple times through September 2025 to include additional related CVEs. No patch is currently available from the vendor.

Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2024-04-09
Original CVE updated
2026-05-14
Advisory published
2024-04-09
Advisory updated
2026-05-14

Who should care

Industrial control system operators using Siemens SIMATIC S7-1500 TM MFP with GNU/Linux subsystems, OT security teams, and organizations running Linux-based embedded systems with i.MX media processing capabilities.

Technical summary

The vulnerability exists in the Linux kernel's media subsystem, specifically the i.MX CSC (Color Space Converter) and scaler driver. The v4l2_ctrl_handler_init function allocates memory that is not properly freed when the control handler is released, resulting in a memory leak. On affected Siemens SIMATIC S7-1500 TM MFP systems with GNU/Linux subsystems, repeated operations involving video processing could lead to gradual memory exhaustion, potentially causing denial of service conditions. The attack requires user interaction but can be triggered remotely over the network.

Defensive priority

HIGH

Recommended defensive actions

  • Restrict interactive shell access to the GNU/Linux subsystem to trusted personnel only
  • Build and run only applications from trusted sources
  • Monitor for anomalous resource consumption patterns that may indicate memory exhaustion
  • Apply kernel updates from Siemens when available
  • Implement network segmentation to limit exposure of affected industrial control systems

Evidence notes

Vulnerability confirmed in CISA ICS advisory ICSA-24-102-01 and Siemens security advisory SSA-265688. Memory leak specifically identified in v4l2_ctrl_handler_init allocation path in Linux kernel media: imx: csc/scaler component.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-27076 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-27076

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

  • CVE-2024-27076 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-27076

    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.