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PatchSiren cyber security CVE debrief

CVE-2024-42082 Siemens CVE debrief

This CVE describes an unused WARN() macro in the Linux kernel's XDP (eXpress Data Path) memory registration function __xdp_reg_mem_model(). The vulnerability was published on 2025-08-12 and last modified on 2026-02-25. Siemens ProductCERT issued advisory SSA-355557 covering this issue, which CISA subsequently republished as ICSA-25-226-07. The advisory was updated multiple times, with the most recent revision on 2026-02-25 clarifying affected configurations for the SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family and removing several rejected CVEs from the advisory. The CVSS v3.1 score of 5.5 (MEDIUM) indicates moderate severity. The issue affects Siemens industrial networking products running SINEC OS that incorporate the vulnerable Linux kernel component, specifically the RUGGEDCOM RST2428P and certain SCALANCE X-family switches. The threat assessment in the source advisory categorizes the impact as 'Misinformed' for the affected products. No known exploitation in ransomware campaigns has been reported, and this CVE is not listed in CISA's Known Exploited Vulnerabilities (KEV) catalog.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
MEDIUM 5.5
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

Organizations operating Siemens industrial networking infrastructure including RUGGEDCOM RST2428P switches and SCALANCE X-family managed switches in critical infrastructure, manufacturing, energy, and transportation sectors. Security teams responsible for OT/ICS environments using SINEC OS should monitor this advisory for product-specific impact determinations.

Technical summary

The vulnerability exists in the Linux kernel's XDP (eXpress Data Path) subsystem, specifically in the __xdp_reg_mem_model() function which registers memory models for XDP operation. An unused WARN() macro in this function represents a code quality issue that could potentially lead to unexpected behavior or information disclosure through kernel warning messages. XDP is a high-performance data path used for packet processing in the Linux kernel, commonly employed in networking applications including industrial control systems. The issue affects Siemens products running SINEC OS that incorporate the vulnerable kernel component. The 'Misinformed' impact assessment suggests this may relate to incorrect or misleading information being logged or reported rather than direct security impact.

Defensive priority

medium

Recommended defensive actions

  • Review Siemens ProductCERT advisory SSA-355557 for current affected product status and patch availability
  • Verify SINEC OS version on deployed Siemens RUGGEDCOM and SCALANCE devices
  • Apply vendor-provided firmware updates when available per Siemens security advisory guidance
  • Monitor CISA ICS advisories for updates to ICSA-25-226-07
  • Implement network segmentation for industrial control systems per CISA recommended practices
  • Follow defense-in-depth strategies for ICS environments as outlined in CISA guidance

Evidence notes

The source CISA CSAF advisory (ICSA-25-226-07) explicitly lists this CVE with threat category 'impact' and details 'Misinformed' for products CSAFPID-0006, CSAFPID-0002, and CSAFPID-0003. The revision history shows four updates, with the 2026-02-25 update specifically noting 'CISA Republication update based on Siemens ProductCERT SSA-355557 advisory.' The affected product list includes RUGGEDCOM RST2428P (6GK6242-6PA00), SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, and SCALANCE XCM-/XRM-/XCH-/XRH-300 family. No affected product IDs are listed in the current advisory version, suggesting these products may have been moved to 'Known Not Affected' status in earlier revisions per the 2026-02-12 update summary.

Official resources

2025-08-12