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CVE-2024-58014 Siemens CVE debrief

CVE-2024-58014 is a medium-severity vulnerability (CVSS 6.0) affecting the brcmsmac Wi-Fi driver in the Linux kernel, specifically within the `wlc_phy_iqcal_gainparams_nphy()` function. The issue involves a missing gain range check that could lead to out-of-bounds access or improper calibration parameters. Siemens has identified this vulnerability as affecting the GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP industrial control system. The vulnerability was published on April 9, 2024, and the advisory has been actively maintained with multiple updates through September 2025, indicating ongoing monitoring and additional CVE additions to the same advisory bundle. As of the latest advisory revision, no patch is available from Siemens for this specific product. The vulnerability requires local access and high privileges to exploit, with potential impacts to confidentiality and availability. Organizations should implement access controls and trusted source policies as interim mitigations.

Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS
MEDIUM 6
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 the GNU/Linux subsystem enabled; OT security teams managing embedded Linux environments; organizations with defense-in-depth requirements for critical infrastructure.

Technical summary

The vulnerability exists in the brcmsmac (Broadcom 802.11n Wireless LAN driver) within the Linux kernel's PHY calibration code. The `wlc_phy_iqcal_gainparams_nphy()` function lacks proper validation of gain parameters, potentially allowing out-of-bounds access when processing calibration data. This affects the GNU/Linux subsystem embedded in Siemens SIMATIC S7-1500 TM MFP devices. The vulnerability is locally exploitable with high privileges required, limiting attack surface to authenticated users with shell access to the Linux subsystem.

Defensive priority

medium

Recommended defensive actions

  • Limit interactive shell access to the GNU/Linux subsystem to trusted personnel only
  • Only build and run applications from trusted sources
  • Monitor for future security updates from Siemens ProductCERT
  • Apply defense-in-depth strategies for industrial control systems
  • Review and implement ICS-CERT recommended practices for network segmentation

Evidence notes

The vulnerability description indicates this is a Linux kernel Wi-Fi driver issue (brcmsmac) affecting a gain range check. The Siemens product uses an embedded GNU/Linux subsystem, making it susceptible to this kernel-level vulnerability. The CVSS vector confirms local attack vector with high privileges required.

Official resources

This vulnerability was disclosed through coordinated disclosure via CISA and Siemens ProductCERT. The advisory ICSA-24-102-01 was initially published on April 9, 2024, and has undergone ten revision cycles, with the most recent update on or