CVE-2021-3319: Zephyrproject Zephyr

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

DOS: Incorrect 802154 Frame Validation for Omitted Source / Dest Addresses. Zephyr versions >= > v2.4.0 contain NULL Pointer Dereference (CWE-476), Attempt to Access Child of a Non-structure Pointer (CWE-588). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-94jg-2p6q-5364

Affected products

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

Published 2021-10-05. Last modified 2026-06-17.