PatchSiren cyber security CVE debrief

CVE-2024-26685 Siemens CVE debrief

A vulnerability in the Linux kernel's nilfs2 filesystem was resolved with a fix for a potential bug in the end_buffer_async_write function. The issue was addressed in the kernel source tree. Siemens has assessed this CVE as affecting certain industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE X family devices. The vulnerability was initially published on August 12, 2025, with subsequent advisory updates through February 2026 to correct affected product listings and remove rejected CVEs. Siemens ProductCERT issued advisory SSA-613116 addressing this issue. CISA republished the advisory on February 25, 2026, based on the updated Siemens guidance. No CVSS score or severity rating is available from the provided sources. 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 SINEC OS-based industrial networking infrastructure, including RUGGEDCOM RST2428P and SCALANCE X family devices. Security teams responsible for Linux kernel vulnerability management in embedded industrial systems. OT security practitioners tracking CISA ICS advisories for critical infrastructure environments.

Technical summary

The vulnerability exists in the nilfs2 filesystem implementation within the Linux kernel, specifically in the end_buffer_async_write function. The issue was resolved with a kernel patch. Siemens industrial networking products running SINEC OS were assessed for impact, with advisory updates indicating corrections to affected product listings over time. The nilfs2 filesystem is a log-structured file system that may not be commonly deployed on industrial networking equipment, suggesting the vulnerability's practical impact may be limited in typical operational environments.

Defensive priority

routine

Recommended defensive actions

Review Siemens ProductCERT advisory SSA-613116 for current affected product status and remediation guidance
Verify SINEC OS version on affected Siemens devices and apply vendor-recommended updates
Assess whether nilfs2 filesystem functionality is enabled or required in deployed configurations
Monitor CISA ICS advisories for subsequent updates to ICSA-25-226-15
Follow CISA ICS recommended practices for defense-in-depth strategies

Evidence notes

The source advisory indicates this CVE was assessed as 'Misinformed' in impact categorization for affected product IDs. The nilfs2 filesystem is not typically deployed on Siemens industrial networking equipment, suggesting potential discrepancy in initial vulnerability mapping.

Official resources

The vulnerability was resolved in the Linux kernel nilfs2 subsystem. Siemens ProductCERT published advisory SSA-613116, subsequently republished by CISA as ICSA-25-226-15. The advisory underwent multiple revisions between August 2025 and Fe