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PatchSiren cyber security CVE debrief

CVE-2024-53237 Siemens CVE debrief

A use-after-free vulnerability exists in the Bluetooth subsystem's device_for_each_child function, where a device may be accessed after it has been freed, potentially leading to a dangling pointer and system instability. This vulnerability was initially reported as affecting Siemens industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE X-300/XR-300/XC-400/XR-500WG/XR-500 families. However, subsequent analysis and advisory updates indicate this CVE was incorrectly attributed to these products. The CISA advisory ICSA-25-226-07 was republished on February 25, 2026, based on Siemens ProductCERT SSA-355557, which clarified the affected product scope. The vulnerability description references a Linux kernel Bluetooth subsystem issue, suggesting this may be a third-party component vulnerability that was initially misidentified as affecting Siemens products.

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 RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500, or SCALANCE XCM-/XRM-/XCH-/XRH-300 families should verify current advisory status. Security teams managing industrial control systems with Bluetooth capabilities should monitor for kernel-level patches. Asset owners relying on CISA ICS advisories should note the February 2026 advisory republication and product scope clarification.

Technical summary

The vulnerability involves a use-after-free condition in the Linux Bluetooth subsystem's device_for_each_child function. This kernel-level issue could allow access to freed memory, resulting in dangling pointers and potential system instability. The vulnerability was initially included in CISA's advisory for Siemens SINEC OS-based products but was subsequently identified as misattributed. The technical root cause appears to be improper synchronization between device removal and iteration operations in the Bluetooth driver stack, a pattern consistent with Linux kernel CVEs rather than Siemens proprietary code.

Defensive priority

medium

Recommended defensive actions

  • Verify current product security bulletin status through Siemens ProductCERT before applying any patches
  • Review SINEC OS release notes for any Bluetooth-related kernel updates
  • Apply defense-in-depth network segmentation for industrial control systems per CISA recommended practices
  • Monitor Siemens security advisories for definitive affected product confirmation
  • Ensure Bluetooth interfaces on industrial devices are disabled if not required for operations

Evidence notes

The source advisory ICSA-25-226-07 underwent multiple revisions. The February 25, 2026 republication specifically notes it was updated based on Siemens ProductCERT SSA-355557. The threat category in the source data is marked as 'Misinformed' for affected products, indicating potential incorrect attribution. The vulnerability description matches known Linux kernel Bluetooth use-after-free patterns rather than Siemens-specific implementations.

Official resources

2025-08-12