PatchSiren cyber security CVE debrief

CVE-2023-52619 Siemens CVE debrief

A vulnerability in the Linux kernel's pstore/ram subsystem could cause system crashes when the number of CPUs is configured to an odd number. The issue has been resolved in the kernel. Siemens has identified this vulnerability as affecting certain industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE X-family switches. CISA published advisory ICSA-25-226-15 on August 12, 2025, with subsequent updates through February 25, 2026, to refine affected product listings and incorporate Siemens ProductCERT guidance. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities 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 SCALANCE X-family switches, RUGGEDCOM RST2428P devices, or other SINEC OS-based industrial networking equipment should prioritize assessment. OT security teams managing critical infrastructure networks, manufacturing environments, and utility control systems using these products need to evaluate exposure and coordinate patching with operational requirements.

Technical summary

The vulnerability exists in the Linux kernel's persistent storage (pstore) RAM backend. When the system is configured with an odd number of CPUs, the pstore/ram implementation can trigger a crash condition. This represents a denial-of-service vector that could impact system availability. The fix involves correcting the CPU count handling logic in the pstore/ram subsystem. Siemens industrial networking products utilizing affected kernel versions in SINEC OS are impacted, with specific product families identified in vendor advisories.

Defensive priority

medium

Recommended defensive actions

Review Siemens ProductCERT SSA-613116 for detailed product-specific patch guidance
Verify SINEC OS version on affected SCALANCE and RUGGEDCOM devices
Apply vendor-provided firmware updates to address the underlying kernel vulnerability
For systems where immediate patching is not feasible, assess CPU configuration as a potential temporary mitigation factor
Monitor CISA ICS advisories for additional guidance on industrial control system protections

Evidence notes

CVE description indicates kernel-level crash condition tied to CPU count configuration. Siemens ProductCERT SSA-613116 and CISA ICSA-25-226-15 identify affected industrial control system products. Source advisory revision history shows iterative corrections to product scope between February 12-25, 2026.

Official resources

2025-08-12