CVE-2020-13594: Espressif Esp-Idf

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier (for ESP32 devices) does not properly restrict the channel map field of the connection request packet on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.

Affected products

• Espressif Esp-Idf: up to and including 4.2

Published 2020-08-31. Last modified 2026-06-17.