CVE-2021-3329 json
DOS: Incorrect handling of the initial HCI ACL_MTU handshake packet leads to crash of bluetooth host layer
published 3y ago modified 4mo ago also EUVD-2021-26660
- cvss
- 9.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
Lack of proper validation in HCI Host stack initialization can cause a crash of the bluetooth stack
Is CVE-2021-3329 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- zephyrprojectsec.atlassian.net https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-117 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- zephyrproject-rtos zephyr
Classification
References
-
zephyrprojectsec.atlassian.net
/browse/ZEPSEC-117
exploit, issue-tracking, vendor-advisory
Sources
- CVE List CVE-2021-3329
- NVD CVE-2021-3329
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