VULNERABILITY INTELLIGENCE

CVE-2021-3321

CVSS score7.5 HIGH

EPSS probability0.76%

CISA KEVNot currently listed

Published2021-10-12

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:H

Description

Integer Underflow in Zephyr in IEEE 802154 Fragment Reassembly Header Removal. Zephyr versions >= >=2.4.0 contain Integer Overflow to Buffer Overflow (CWE-680). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w44j-66g7-xw99

Weakness classification

vulnerabilities@zephyrproject.org: CWE-680
nvd@nist.gov: CWE-191

Primary references

vulnerabilities@zephyrproject.org — Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Patch, Third Party Advisory