CVE-2021-3966: Zephyrproject Zephyr

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

usb device bluetooth class includes a buffer overflow related to implementation of net_buf_add_mem.

Affected products

• Zephyrproject Zephyr: before 3.0.0 (fixed in 3.0.0)

Published 2023-01-11. Last modified 2026-06-17.