CVE-2021-3432: BT: Invalid interval in CONNECT_IND leads to Division by Zero

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% 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-369

Description

Invalid interval in CONNECT_IND leads to Division by Zero. Zephyr versions >= v1.14.0 Divide By Zero (CWE-369). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7364-p4wc-8mj4

Affected products

zephyrproject zephyr: from 1.14.0 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-7364-p4wc-8mj4
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7364-p4wc-8mj4

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