CVE-2026-25508ESF-IDF Has Memory Safety Vulnerabilities in BLE Provisioning
- 6.3MediumCVSS base score
- 0.24%Exploitation in 30 daysEPSS · top 85% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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 transport (protocomm_ble). The issue can be triggered by a remote BLE client while the device is in provisioning mode. The transport accumulated prepared-write fragments in a fixed-size buffer but incorrectly tracked the cumulative length. By sending repeated prepare write requests with overlapping offsets, a remote client could cause the reported length to exceed the allocated buffer size. This inflated length was then passed to provisioning handlers during execute-write processing, resulting in an out-of-bounds read and potential memory corruption. This issue has been patched in versions 5.5.3, 5.4.4, 5.3.5, 5.2.7, and 5.1.7.
Timeline
ID reserved
By GitHub_M
- 2 days later
· 2 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium6.3 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H |
| NVDNVD · Analyzed | 3.1 | Medium6.3 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.3.
Affected products
References
References8
- https://github.com/espressif/esp-idf/security/advisories/GHSA-9j5x-rf36-54x9 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/espressif/esp-idf/commit/0540c85140c2c06c0cbecc8843277ea676d5c4a9 (opens in a new tab)x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/1ff264abf2504cade46f0ce3a03f821310bcf6d7 (opens in a new tab)x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/47552ff4fd824caf38215468ebd2f31fb5f36d70 (opens in a new tab)x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/4c3fdcd316f780bab4ae5aa73c9626ea9fe24ac6 (opens in a new tab)x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/894c28afe3f2f8f31ff25b64191883517dddb5cf (opens in a new tab)x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/cde7b7362adc15638c141c249681cbe5d23de663 (opens in a new tab)x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/dba9a7dc01e4dab14c77d328f6a6f46369aeee63 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-5378 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-25508)Record last updated .