PatchSiren cyber security CVE debrief

CVE-2024-47747 Siemens CVE debrief

A use-after-free vulnerability exists in the Linux kernel's ether3 network driver due to a race condition between timer initialization and device removal. The vulnerability occurs in the ether3_probe function where a timer is initialized with a callback bound to device memory; if the module or device is removed before the timer expires, the ether3_remove cleanup function may free memory that the timer callback (ether3_ledoff) subsequently attempts to access. This affects Siemens industrial networking products running SINEC OS that incorporate the vulnerable kernel component. The vulnerability is rated MEDIUM severity with a CVSS 3.1 score of 5.5, reflecting local attack vector, low attack complexity, and high availability impact. Siemens has released firmware updates to address this issue.

Vendor: Siemens
Product: RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS: MEDIUM 5.5
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 RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500, or SCALANCE XCM-/XRM-/XCH-/XRH-300 industrial Ethernet switches in critical infrastructure environments, particularly those with physical access by multiple users or untrusted administrators.

Technical summary

The vulnerability stems from improper synchronization between kernel timer initialization and device teardown paths in the seeq ether3 Ethernet driver. The timer callback ether3_ledoff is registered during probe with a reference to device-private memory; concurrent removal via ether3_remove can free this memory while the timer remains pending, leading to use-after-free when the callback executes. This is a classic race condition pattern in Linux kernel driver lifecycle management.

Defensive priority

medium

Recommended defensive actions

Apply vendor-provided firmware updates: Update RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices to firmware version V3.2 or later. For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices,西门子
Apply vendor-provided firmware updates: Update RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices to firmware version V3.2 or later. For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices,西门子
Apply vendor-provided firmware updates: Update RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices to firmware version V3.2 or later. For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices,西门子
Apply vendor-provided firmware updates: Update RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices to firmware version V3.2 or later. For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices,西门子
Apply vendor-provided firmware updates: Update RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices to firmware version V3.2 or later. For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices,西门子
Apply vendor-provided firmware updates: Update RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices to firmware version V3.2 or later. For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices,西门子
Apply vendor-provided firmware updates: Update RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices to firmware version V3.2 or later. For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices,西门子
Apply vendor-provided firmware updates: Update RUGGEDCOM RST2428P and SCALANCE XCM-/XRM-/XCH-/XRH-300 family devices to firmware version V3.2 or later. For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family devices,西门子

Evidence notes

Vulnerability description and affected product information derived from CISA CSAF advisory ICSA-25-226-07, which republishes Siemens ProductCERT advisory SSA-355557. The advisory was initially published on 2025-08-12 and most recently updated on 2026-02-25 to correct affected product listings and clarify configuration details for the SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family.

Sources and references

Verified primary and authoritative sources

CVE-2024-47747 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2024-47747

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2024-47747 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2024-47747

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Source item URL
Unverified legacy reference

URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2025/icsa-25-226-07.json

cisa_csaf
Source reference
Unverified legacy reference

URL: https://cert-portal.siemens.com/productcert/csaf/ssa-355557.json

Reference
Source reference
Unverified legacy reference

URL: https://cert-portal.siemens.com/productcert/html/ssa-355557.html

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-07

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/topics/industrial-control-systems

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.