CVE-2021-28135 json
The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly handle the reception of continuous unsolicited…
published 2021-09-07 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-14834
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service (crash) in ESP32 by flooding the target device with LMP Feature Response data.
Exploit prediction
0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 3.3 | AV:A/AC:L/Au:N/C:N/I:N/A:P |
References
-
github.com
/espressif/esp-idf
third-party-advisory
-
github.com
/espressif/esp32-bt-lib
third-party-advisory
-
espressif.com
/en/products/socs/esp32
product
-
dl.packetstormsecurity.net
/papers/general/braktooth.pdf
broken-link
Sources
- CVE List CVE-2021-28135
- NVD CVE-2021-28135
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