Use After Free in Espressif Esp-Idf
CVE-2026-25507
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.004 (28.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Espressif Esp-Idf — versions = 5.4.3, 5.4.3, 5.2.6
Weakness classification (CWE)
References
- github.com/espressif/esp-idf/security/advisories/GHSA-h7r3-gmg9-xjmg (Third Party Advisory)
- github.com/espressif/esp-idf/commit/0540c85140c2c06c0cbecc8843277ea676d5c4a9 (Patch)
- github.com/espressif/esp-idf/commit/1ff264abf2504cade46f0ce3a03f821310bcf6d7 (Patch)
- github.com/espressif/esp-idf/commit/47552ff4fd824caf38215468ebd2f31fb5f36d70 (Patch)
- github.com/espressif/esp-idf/commit/4c3fdcd316f780bab4ae5aa73c9626ea9fe24ac6 (Patch)
- github.com/espressif/esp-idf/commit/894c28afe3f2f8f31ff25b64191883517dddb5cf (Patch)
- github.com/espressif/esp-idf/commit/cde7b7362adc15638c141c249681cbe5d23de663 (Patch)
- github.com/espressif/esp-idf/commit/dba9a7dc01e4dab14c77d328f6a6f46369aeee63 (Patch)
Frequently asked questions
- What is CVE-2026-25507?
- CVE-2026-25507 is a medium-severity vulnerability in Espressif Esp-Idf, classified under Use After Free. CVSS score: 6.3/10. Published 2026-02-04.
- How severe is CVE-2026-25507?
- Medium severity. CVSS v3 base score is 6.3 out of 10.