PatchSiren cyber security CVE debrief

CVE-2024-26788 Siemens CVE debrief

A vulnerability in the Linux kernel's Freescale QDMA engine driver (fsl-qdma) was resolved by reordering initialization sequence: IRQ registration now occurs after register initialization. The flaw could lead to race conditions or undefined behavior if interrupts fired before hardware registers were properly configured. Siemens has assessed this CVE as 'Misinformed' for affected industrial networking products including RUGGEDCOM RST2428P and SCALANCE X-family switches running SINEC OS, indicating the vulnerability does not apply to these specific product configurations.

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 industrial networking infrastructure using SINEC OS on RUGGEDCOM or SCALANCE devices; Linux kernel maintainers working with fsl-qdma driver on NXP/Freescale QorIQ platforms

Technical summary

The vulnerability exists in the Freescale QDMA (Queue-based Direct Memory Access) engine driver within the Linux kernel's dmaengine subsystem. The issue stems from interrupt request (IRQ) initialization occurring before hardware register initialization, creating a potential race condition window. The resolution reorders the initialization sequence to ensure registers are configured prior to IRQ registration. Siemens ProductCERT has evaluated this CVE against their industrial networking product portfolio and determined it to be 'Misinformed'—meaning the vulnerability as described does not apply to the specific product configurations listed, which include RUGGEDCOM RST2428P and multiple SCALANCE X-family switch families running SINEC OS. The CISA republication on 2026-02-25 reflects the latest vendor assessment based on Siemens SSA-613116 advisory.

Defensive priority

low

Recommended defensive actions

Verify SINEC OS version on affected Siemens devices; versions 3.1 and above are supported and maintained per vendor advisory
Review vendor security advisory SSA-613116 for definitive product impact assessment
Apply standard ICS defense-in-depth practices per CISA guidance for industrial control systems
Monitor CISA ICS advisories for any future reassessment of this CVE

Evidence notes

CISA CSAF advisory ICSA-25-226-15 (republished 2026-02-25) carries Siemens ProductCERT SSA-613116 assessment marking CVE-2024-26788 as 'Misinformed' for affected product IDs. Linux kernel fix description confirms driver initialization order correction. No CVSS score assigned in source corpus.

Official resources

2025-08-12