PatchSiren cyber security CVE debrief

CVE-2024-26748 Siemens CVE debrief

A double-free vulnerability in the Linux kernel's Cadence USB3 (cdns3) driver could allow memory corruption when handling zero-length USB packets. The vulnerability was resolved in the Linux kernel. Siemens has identified this CVE as applicable to certain industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE X-300/XR-300/XC-400/XR-500 families. The CISA advisory ICSA-25-226-15 was initially published on August 12, 2025, and underwent multiple revisions through February 25, 2026, including corrections to affected product lists and removal of rejected CVEs. No CVSS score or severity rating is available in the source corpus. This vulnerability is not listed in CISA's Known Exploited Vulnerabilities (KEV) catalog.

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 family devices in industrial control environments. System administrators responsible for OT/ICS network security and patch management.

Technical summary

The vulnerability exists in the Cadence USB3 (cdns3) driver within the Linux kernel. A double-free condition occurs when handling zero-length USB packets, potentially leading to memory corruption. This affects embedded Linux systems using the cdns3 driver, including Siemens industrial networking equipment running SINEC OS. The fix involves correcting memory management in the zero-packet handling path.

Defensive priority

medium

Recommended defensive actions

Review Siemens ProductCERT advisory SSA-613116 for affected product versions and patch availability
Apply vendor-provided firmware updates for SINEC OS-based devices when available
Monitor network segments containing affected SCALANCE and RUGGEDCOM devices for anomalous behavior
Implement network segmentation for industrial control systems per CISA recommended practices
Verify USB device authorization policies on affected systems to reduce attack surface

Evidence notes

The source CISA CSAF advisory (ICSA-25-226-15) identifies this as a Linux kernel vulnerability in the usb: cdns3 driver related to double-free on zero packet handling. Siemens ProductCERT advisory SSA-613116 is the authoritative source for affected product information. The advisory underwent four revision cycles, with the most recent republication on February 25, 2026.

Official resources

2025-08-12