PatchSiren cyber security CVE debrief

CVE-2024-56595 Siemens CVE debrief

CVE-2024-56595 describes an array-index-out-of-bounds vulnerability in the Journaled File System (jfs) within the Linux kernel, specifically in the dbAdjTree function. The issue occurs when a loop variable (lp) starts at 0 and becomes negative on subsequent assignment, leading to an out-of-bounds array access. This vulnerability was published on 2025-08-12 and last modified on 2026-02-25. The vulnerability is present in Siemens industrial networking products running SINEC OS, including the RUGGEDCOM RST2428P and SCALANCE X-family switches. However, CISA's advisory ICSA-25-226-07 marks the impact as 'Misinformed' for the affected products, indicating the actual risk may differ from initial assessment. No CVSS score or severity rating is currently available. Organizations should consult Siemens ProductCERT advisory SSA-355557 for definitive product impact and remediation guidance.

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 industrial networking equipment with SINEC OS, particularly RUGGEDCOM RST2428P and SCALANCE X-series switches. Security teams managing OT/ICS environments with Linux-based embedded systems using JFS filesystems.

Technical summary

The vulnerability exists in the dbAdjTree function of the Journaled File System (jfs) driver. A loop variable initialization defect allows lp to become negative, causing out-of-bounds array access. The issue represents a bounds checking deficiency in kernel filesystem metadata handling code.

Defensive priority

medium

Recommended defensive actions

Review Siemens ProductCERT advisory SSA-355557 for current product impact assessment and patch availability
Verify SINEC OS version and JFS module usage on affected Siemens industrial networking equipment
Apply kernel updates from Siemens when available, prioritizing systems with JFS filesystem exposure
Monitor CISA ICS advisories for updates to impact classification
Implement network segmentation for industrial control systems per CISA recommended practices

Evidence notes

The vulnerability description indicates a classic off-by-one or signedness issue in kernel filesystem code. The 'Misinformed' impact classification in the CISA CSAF data suggests the initial vulnerability report may not accurately reflect actual exploitability in the Siemens product context. The advisory underwent multiple revisions, with the most recent on 2026-02-25 clarifying affected product configurations and removing rejected CVEs.

Official resources

2025-08-12