CVE-2021-3321

HighCVSS 8.8/10Last modified Jun 17, 2026

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

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-680 CWE-191

Affected software

Vendor	Product	Versions
zephyrproject-rtos	zephyr	>= >=2.4.0, < unspecified

References

http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w44j-66g7-xw99Exploit, Patch, Third Party Advisory
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w44j-66g7-xw99Exploit, Patch, Third Party Advisory

Timeline

Published: Oct 12, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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