---
id: CVE-2025-56361
title: >-
  A reachable assertion vulnerability exists in the Matter SDK (connectedhomeip)
  1.3 thru 1.4, specifically within the Level Control cluster's server tick
  logic (`emberAfLevelControlClusterServerTickCallback`)
summary: >-
  A reachable assertion vulnerability exists in the Matter SDK (connectedhomeip)
  1.3 thru 1.4, specifically within the Level Control cluster's server tick
  logic (`emberAfLevelControlClusterServerTickCallback`). When a MoveToLevel
  command i…
severity: medium
cvss: 5.7
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-617
vendor: csa-iot
product: matter
affected:
  - matter = 1.3.0.0
  - matter = 1.4.0.0
published: '2026-07-14'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T19:39:07.467'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-56361'
references:
  - url: 'https://github.com/project-chip/connectedhomeip/'
    label: cve@mitre.org
  - url: 'https://github.com/project-chip/connectedhomeip/issues/38619'
    label: cve@mitre.org
  - url: 'https://github.com/project-chip/connectedhomeip/issues/38619'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00581
epssPercentile: 0.45863
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-05T17:45:46.047307Z'
ingestedAt: '2026-10-05T18:29:11.170Z'
---

## Overview

A reachable assertion vulnerability exists in the Matter SDK (connectedhomeip) 1.3 thru 1.4, specifically within the Level Control cluster's server tick logic (`emberAfLevelControlClusterServerTickCallback`). When a MoveToLevel command is executed and followed by a conflicting write to the OperationMode attribute (in the Pump Configuration and Control cluster), an invariant check (`minLevel < currentLevel`) fails and causes the device to abort. This leads to a denial of service condition. The issue is confirmed in SDK versions 1.3 and 1.4 (commit ab3d5ae), and is triggered remotely without authentication.

## Affected

- `matter = 1.3.0.0`
- `matter = 1.4.0.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.