CVE-2023-52602 Siemens CVE debrief

Who should care

Organizations operating Siemens SCALANCE and RUGGEDCOM industrial Ethernet switches in manufacturing, energy, transportation, and critical infrastructure environments. Security teams responsible for OT/ICS asset management and patch coordination should prioritize vendor advisory monitoring given the multi-revision disclosure timeline.

Technical summary

CVE-2023-52602 is a slab-out-of-bounds read vulnerability in the dtSearch function of the Journaled File System (JFS) in the Linux kernel. JFS is a 64-bit journaling filesystem developed by IBM and integrated into Linux. The dtSearch function handles directory tree searches, and the out-of-bounds read indicates insufficient bounds checking when processing JFS directory structures, potentially leading to information disclosure or system instability. The vulnerability was resolved in upstream Linux kernel development. Siemens identified this vulnerability as affecting certain industrial network infrastructure products running Linux-based firmware, specifically the SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family and RUGGEDCOM RST2428P switches. The advisory underwent substantial revision post-publication to correct product impact assessments, indicating initial analysis challenges in determining precise affected versions.

Defensive priority

medium

Recommended defensive actions

• Review Siemens SSA-613116 security advisory for current affected product status and patch availability
• Verify Linux kernel version in affected Siemens SCALANCE and RUGGEDCOM devices against vendor-provided fixed versions
• Apply vendor-supplied firmware updates for SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family and RUGGEDCOM RST2428P as available
• Monitor CISA ICS advisories for additional guidance on industrial control system protections
• Implement network segmentation for industrial control systems per CISA recommended practices to limit exposure of affected devices

Evidence notes

The vulnerability description indicates a slab-out-of-bounds read in the JFS dtSearch function, a memory safety issue in the Linux kernel's Journaled File System implementation. The source advisory (ICSA-25-226-15) underwent three revisions after initial publication: February 12, 2026 (corrected affected products list), February 24, 2026 (removed unsupported version references and rejected CVEs), and February 25, 2026 (CISA republication based on Siemens SSA-613116). The threat assessment in the source marks impact as 'Misinformed' for the product IDs listed, suggesting potential analysis complexity or information quality considerations in initial assessments.

Official resources