CVE-2024-56317: Matter

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

In Matter (aka connectedhomeip or Project CHIP) through 1.4.0.0, the WriteAcl function deletes all existing ACL entries first, and then attempts to recreate them based on user input. If input validation fails during decoding, the process stops, and no entries are restored by access-control-server.cpp, i.e., a denial of service.

Affected products

• Matter Matter: up to and including 1.4.0.0

Published 2024-12-18. Last modified 2026-06-17.