PatchSiren cyber security CVE debrief

CVE-2024-26684 Siemens CVE debrief

This CVE addresses a vulnerability in the Linux kernel's stmmac (Synopsys DesignWare Ethernet MAC) driver, specifically within the XGMAC (10 Gigabit Ethernet MAC) implementation. The issue involves improper handling of DPP (Data Path Protection) safety errors for DMA channels. DPP is a safety mechanism designed to detect and handle errors in data transmission paths. When this safety error handling fails, it could lead to system instability or potential security implications in network data processing. The vulnerability was resolved through a kernel patch that corrects the DPP safety error handling logic for DMA channels in the XGMAC driver.

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 industrial Ethernet infrastructure including SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family, and RUGGEDCOM RST2428P switches. OT security teams managing Linux-based embedded systems with Synopsys DesignWare Ethernet MAC controllers should also assess exposure.

Technical summary

The vulnerability exists in the Linux kernel's stmmac Ethernet driver, specifically the XGMAC (10 Gigabit Ethernet MAC) implementation's handling of DPP (Data Path Protection) safety errors for DMA channels. DPP mechanisms are designed to detect data path integrity issues; improper handling of these errors could result in undefined behavior during network operations. The fix ensures proper error handling paths are executed when DPP safety errors are detected in DMA channel operations.

Defensive priority

medium

Recommended defensive actions

Review Siemens ProductCERT advisory SSA-613116 for specific patch availability and version guidance for affected SCALANCE and RUGGEDCOM products
Apply vendor-provided firmware updates for affected Siemens industrial Ethernet switches when available
Monitor network device logs for anomalous DMA or Ethernet MAC related errors that could indicate trigger conditions
Implement network segmentation for critical industrial control systems using affected devices
Follow CISA's ICS recommended practices for defense-in-depth strategies in industrial environments

Evidence notes

The vulnerability description indicates this was a resolved issue in the Linux kernel's network driver subsystem. The source advisory (ICSA-25-226-15) from CISA's CSAF repository identifies affected Siemens industrial networking products that incorporate the vulnerable kernel component. The advisory's revision history shows ongoing refinement of affected product lists, with corrections made in February 2026 to accurately reflect impacted systems.

Official resources

2025-08-12