CVE-2021-3433: BT: Invalid channel map in CONNECT_IND results to Deadlock

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-06-28 · updated 2026-06-17
Weakness: CWE-703

Description

Invalid channel map in CONNECT_IND results to Deadlock. Zephyr versions >= v2.5.0 Improper Check or Handling of Exceptional Conditions (CWE-703). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3c2f-w4v6-qxrp

Affected products

zephyrproject zephyr: from 2.5.0 before 2.6.0 — fixed in 2.6.0

How to fix

Upgrade to a fixed version: zephyrproject zephyr 2.6.0. Check the vendor advisory for mitigations.

References

http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3c2f-w4v6-qxrp
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3c2f-w4v6-qxrp

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