CVE-2025-56365: CSA-IoT Matter

Medium severity, CVSS 5.7. EPSS: 0.3% chance of exploitation in the next 30 days.

A reachable assertion vulnerability exists in the Matter SDK (connectedhomeip) before 1.4.0, in the interaction model command processing logic. When an InvokeCommandRequest is sent to a nonexistent endpoint and cluster (e.g., 0x34), the code incorrectly treats the endpoint as valid due to missing checks in CodegenDataModelProvider::Invoke. This causes a VerifyOrDie failure in ProcessCommandDataIB and results in a crash (SIGABRT). The issue has been acknowledged and fixed in a later revision (PR #37207).

Affected products

• CSA-IoT Matter: before 1.4.0.0 (fixed in 1.4.0.0)

Published 2026-07-14. Last modified 2026-10-05.