VULNERABILITY INTELLIGENCE

CVE-2021-3455

CVSS score4.3 MEDIUM
EPSS probability1.11%
CISA KEVNot currently listed
Published2021-10-19
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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

Weakness classification

  • CWE-416: Use After Free

Primary references