PatchSiren cyber security CVE debrief

CVE-2024-26910 Siemens CVE debrief

This CVE addresses a performance regression in the Linux kernel's netfilter ipset subsystem, specifically affecting the swap operation. The vulnerability was resolved in the Linux kernel and affects Siemens industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE X-family switches. The issue is classified as a performance regression rather than a traditional security vulnerability with direct exploitability. CISA and Siemens published coordinated advisories in August 2025, with subsequent updates through February 2026 to correct affected product listings and remove rejected CVEs. No CVSS score is available in the source data, and the vulnerability is not listed in CISA's Known Exploited Vulnerabilities (KEV) 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 RUGGEDCOM and SCALANCE industrial networking equipment with SINEC OS should monitor this advisory for completeness, though the reclassified impact suggests limited operational concern. Security teams maintaining Linux-based industrial systems should track kernel netfilter updates as part of routine maintenance.

Technical summary

The vulnerability exists in the Linux kernel's netfilter ipset subsystem, which provides framework for IP set management used in firewall rules. The specific issue involves a performance regression during swap operations, where inefficient handling could degrade system performance. The fix was committed to the Linux kernel mainline. Siemens products incorporating this kernel component were initially flagged but subsequently reclassified as 'Misinformed' impact, suggesting the vulnerability may not be practically exploitable or relevant in the vendor's specific implementation context.

Defensive priority

low

Recommended defensive actions

Review Siemens ProductCERT SSA-613116 for current product impact assessment
Verify SINEC OS version on affected Siemens industrial switches and routers
Apply standard kernel maintenance updates through vendor channels if applicable
Monitor CISA ICS advisories for any future reclassification

Evidence notes

The source advisory (ICSA-25-226-15) indicates this CVE was initially included in a Siemens ProductCERT advisory but later analysis determined the impact was 'Misinformed' per the threat category in the CSAF data. The February 2026 republication removed rejected CVEs and clarified product scope. The vulnerability description indicates a kernel-level fix for ipset swap performance, typical of Linux netfilter maintenance fixes.

Official resources

2025-08-12