CVE-2026-10680: zephyr from 4.2.0 (inclusive), before 4.3.1 (exclusive), from 4.4.0 (inclusive), through 4.4.1 (inclusive), 4.2.0 to…

Affected technology

zephyr · from 4.2.0 (inclusive), before 4.3.1 (exclusive)
zephyrproject

zephyr · from 4.4.0 (inclusive), through 4.4.1 (inclusive)
zephyrproject

zephyr · 4.2.0 to before 4.3.1, 4.4.0 to before 4.4.2
zephyrproject

Component: Not specified by the source
File: subsys/bluetooth/host/classic/l2cap_br.c

Attack conditions (Vendor/CNA, CVSS 3.1): Adjacent network · No privileges required · No user interaction required

What an attacker can do

An attacker can send a CONF_REQ command with a header length smaller than the configuration-request structure (e.g. 0), followed by another command so that buf->len still satisfies the check. Vendor/CNA’s CVSS 3.1 assessment (base score 7.6/10) rates confidentiality and integrity impact as low; availability impact as high.