Out-of-bounds Read in Espressif Esp-idf
CVE-2026-25508
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, an out-of-bounds read vulnerability was reported in the BLE ATT Prepare Write handling of the BLE provisioning tran…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (8.7th percentile) — read the EPSS interpretation.
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.
Affected products
- Espressif Esp-idf — versions = 5.5.2, = 5.4.3, = 5.3.4
Weakness classification (CWE)
References
- https://github.com/espressif/esp-idf/security/advisories/GHSA-9j5x-rf36-54x9 (x_refsource_CONFIRM)
- https://github.com/espressif/esp-idf/commit/0540c85140c2c06c0cbecc8843277ea676d5c4a9 (x_refsource_MISC)
- https://github.com/espressif/esp-idf/commit/1ff264abf2504cade46f0ce3a03f821310bcf6d7 (x_refsource_MISC)
- https://github.com/espressif/esp-idf/commit/47552ff4fd824caf38215468ebd2f31fb5f36d70 (x_refsource_MISC)
- https://github.com/espressif/esp-idf/commit/4c3fdcd316f780bab4ae5aa73c9626ea9fe24ac6 (x_refsource_MISC)
- https://github.com/espressif/esp-idf/commit/894c28afe3f2f8f31ff25b64191883517dddb5cf (x_refsource_MISC)
- https://github.com/espressif/esp-idf/commit/cde7b7362adc15638c141c249681cbe5d23de663 (x_refsource_MISC)
- https://github.com/espressif/esp-idf/commit/dba9a7dc01e4dab14c77d328f6a6f46369aeee63 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-25508?
- CVE-2026-25508 is a medium-severity vulnerability in Espressif Esp-idf, classified under Out-of-bounds Read. CVSS score: 6.3/10. Published 2026-02-04.
- How severe is CVE-2026-25508?
- Medium severity. CVSS v3 base score is 6.3 out of 10.