CVE-2021-3455

PoC —

CVSS 3.1

7.5 high

EPSS

1%p64

Published

Oct 19, 2021 (Oct 19, 2021)

Modified

Jun 17, 2026

Description

Disconnecting L2CAP channel right after invalid ATT request leads freeze. Zephyr versions >= 2.4.0, >= 2.5.0 contain Use After Free (CWE-416). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-v7vp

Vendors: zephyrproject
Products: zephyr
Weakness: CWE-416
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.1%)

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