PatchSiren cyber security CVE debrief

CVE-2024-53172 Siemens CVE debrief

A vulnerability in the Linux kernel's UBI (Unsorted Block Images) fastmap subsystem allows duplicate slab cache names to be detected, triggering a kernel WARNING. This issue affects Siemens industrial networking products running SINEC OS, specifically the RUGGEDCOM RST2428P and SCALANCE X-family switches. The vulnerability requires local access with low privileges and can result in high availability impact through denial of service conditions.

Vendor: Siemens
Product: RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS: MEDIUM 5.5
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 switches or SCALANCE X-family industrial Ethernet switches in critical infrastructure environments, particularly those in manufacturing, energy, and transportation sectors where SINEC OS is deployed.

Technical summary

The vulnerability exists in the UBI (Unsorted Block Images) fastmap implementation within the Linux kernel. When duplicate slab cache names are detected during fastmap operations, the kernel generates a WARNING condition. This represents a local denial-of-service vector where an attacker with low privileges could potentially trigger kernel warning storms or related instability. The CVSS 3.1 score of 5.5 (MEDIUM) reflects the local attack vector and high availability impact with no confidentiality or integrity impact. The vulnerability is classified under CWE-20 (Improper Input Validation).

Defensive priority

medium

Recommended defensive actions

Apply vendor-provided firmware updates to V3.2 or later for affected RUGGEDCOM and SCALANCE products per Siemens ProductCERT guidance
For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, consult Siemens ProductCERT SSA-355557 for specific configuration guidance
Implement network segmentation for industrial control systems to limit local access vectors
Follow CISA ICS recommended practices for defense-in-depth strategies
Monitor for kernel WARNING messages in system logs that may indicate exploitation attempts

Evidence notes

CVE published 2025-08-12 per CISA CSAF advisory ICSA-25-226-07. Modified 2026-02-25. Siemens ProductCERT SSA-355557 is the canonical vendor advisory. CVSS 3.1 vector: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Official resources

2025-08-12