PatchSiren cyber security CVE debrief

CVE-2023-52847 Siemens CVE debrief

A use-after-free vulnerability in the Linux kernel's BtTV (Brooktree TV) media driver could allow local attackers to cause memory corruption. The flaw exists in the btv->timeout timer handling, where improper synchronization may lead to accessing freed memory. Siemens has assessed this vulnerability as affecting certain industrial network infrastructure products running SINEC OS, which incorporates the vulnerable Linux kernel components. The vulnerability was resolved in the upstream Linux kernel. Organizations should apply vendor-provided updates and follow defense-in-depth practices for industrial control systems.

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 SCALANCE X-family switches, RUGGEDCOM RST2428P devices, or other industrial network infrastructure running SINEC OS should prioritize assessment. System administrators responsible for OT/ICS environments, security teams managing industrial control system assets, and vendors integrating Linux kernel media drivers into embedded products should monitor this vulnerability.

Technical summary

The vulnerability resides in the BtTV (Brooktree TV) video capture driver within the Linux kernel media subsystem. The btv->timeout timer, used for handling capture timeouts, can trigger a use-after-free condition due to improper synchronization between timer cancellation and device teardown paths. When the timer fires after the associated btv structure has been freed, memory corruption occurs. This affects embedded Linux systems incorporating the vulnerable kernel code, including Siemens industrial networking products that utilize the SINEC OS platform built on affected kernel versions.

Defensive priority

medium

Recommended defensive actions

Apply vendor-provided firmware updates for affected Siemens SCALANCE and RUGGEDCOM products when available
Verify SINEC OS version and confirm it is a supported release (3.1 or later per vendor guidance)
Implement network segmentation for industrial control systems to limit exposure of vulnerable devices
Monitor vendor security advisories for additional affected product announcements
Follow CISA ICS recommended practices for defense-in-depth strategies

Evidence notes

The vulnerability description indicates a use-after-free error in the btv->timeout timer within the Linux kernel's media/bttv driver. Siemens ProductCERT advisory SSA-613116 (referenced via CISA ICSA-25-226-15) identifies affected products including RUGGEDCOM RST2428P and SCALANCE X-family devices. The source advisory underwent multiple revisions between February 2026, with the final update on 2026-02-25 reflecting CISA republication based on the Siemens advisory. No CVSS score is available in the source data. The threat assessment in the source marks impact as 'Misinformed' for the listed product IDs, suggesting potential analysis complexity or initial misattribution that was subsequently clarified.

Official resources

2025-08-12