PatchSiren cyber security CVE debrief

CVE-2024-42105 Siemens CVE debrief

A use-after-free vulnerability in the nilfs2 filesystem affects Siemens industrial networking products running SINEC OS. The vulnerability was initially listed in CISA advisory ICSA-25-226-07 published 2025-08-12, which was subsequently revised multiple times through 2026-02-25 to correct affected product listings and remove rejected CVEs. The source advisory explicitly marks impact as 'Misinformed' for the affected product IDs, indicating this CVE's applicability to the listed Siemens products may be erroneous or overstated. No CVSS score or severity is available in the source corpus. The vulnerability originates in the Linux kernel nilfs2 filesystem implementation, not in Siemens proprietary code.

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

Operators of Siemens RUGGEDCOM RST2428P and SCALANCE XC/XR/XCM/XRM/XCH/XRH families running SINEC OS; industrial control system security teams tracking third-party Linux kernel vulnerabilities in OT environments

Technical summary

The nilfs2 filesystem in the Linux kernel contains a use-after-free condition. This CVE was included in CISA advisory ICSA-25-226-07 covering third-party components in Siemens SINEC OS, which powers RUGGEDCOM and SCALANCE industrial network devices. However, the source advisory explicitly categorizes impact as 'Misinformed' for the affected product identifiers, suggesting the CVE may have been incorrectly associated with these products. The nilfs2 filesystem is a log-structured file system not commonly deployed on industrial network appliances, which typically use standard filesystems like ext4 or proprietary implementations. Multiple advisory revisions (2026-02-12, 2026-02-24, 2026-02-25) corrected product listings and removed rejected CVEs, indicating ongoing accuracy improvements to the advisory.

Defensive priority

low

Recommended defensive actions

Verify whether nilfs2 filesystem is enabled or accessible on affected Siemens devices; nilfs2 is not typically used in industrial network appliance deployments
Monitor Siemens ProductCERT advisory SSA-355557 for definitive product impact confirmation
Apply SINEC OS security updates as directed by Siemens ProductCERT when available
Review CISA ICS recommended practices for defense-in-depth strategies for industrial control systems

Evidence notes

Source CISA CSAF advisory ICSA-25-226-07 marks impact as 'Misinformed' for product IDs CSAFPID-0006, CSAFPID-0002, and CSAFPID-0003, which include RUGGEDCOM RST2428P and SCALANCE families. Advisory revision history shows multiple corrections to affected product listings. No CVSS vector or score present in source.

Official resources

2025-08-12