CVE-2026-25507: Espressif Esp-Idf

Medium severity, CVSS 6.3. EPSS: 0.4% chance of exploitation in the next 30 days.

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.2, 5.4.3, 5.3.4, 5.2.6, and 5.1.6, a use-after-free vulnerability was reported in the BLE provisioning transport (protocomm_ble) layer. The issue can be triggered by a remote BLE client while the device is in provisioning mode. The vulnerability occurred when provisioning was stopped with keep_ble_on = true. In this configuration, internal protocomm_ble state and GATT metadata were freed while the BLE stack and GATT services remained active. Subsequent BLE read or write callbacks dereferenced freed memory, allowing a connected or newly connected client to trigger invalid memory acces. This issue has been patched in versions 5.5.3, 5.4.4, 5.3.5, 5.2.7, and 5.1.7.

Affected products

• Espressif Esp-Idf: version 5.1.6 only; version 5.2.6 only; version 5.3.4 only; version 5.4.3 only; version 5.5.2 only

Published 2026-02-04. Last modified 2026-06-17.