CVE-2021-3330: Zephyrproject Zephyr

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

RCE/DOS: Linked-list corruption leading to large out-of-bounds write while sorting for forged fragment list in Zephyr. Zephyr versions >= >=2.4.0 contain Out-of-bounds Write (CWE-787). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fj4r-373f-9456

Affected products

• Zephyrproject Zephyr: from 2.4.0, before 2.5.0 (fixed in 2.5.0)

Published 2021-10-12. Last modified 2026-06-17.