CVE-2021-3434: Zephyrproject Zephyr

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Stack based buffer overflow in le_ecred_conn_req(). Zephyr versions >= v2.5.0 Stack-based Buffer Overflow (CWE-121). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8w87-6rfp-cfrm

Affected products

• Zephyrproject Zephyr: from 2.5.0, before 2.6.0 (fixed in 2.6.0)

Published 2022-06-28. Last modified 2026-06-17.