CVE-2021-3321

HIGH

Zephyr 2.4.0-2.4.9 - Integer Underflow in IEEE 802.15.4 Fragment Reassembly

Title source: llm
STIX 2.1

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

References (1)

Core 1
Core References
Exploit, Patch, Third Party Advisory x_refsource_misc
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w44j-66g7-xw99

Scores

CVSS v3 7.5
EPSS 0.0074
EPSS Percentile 49.5%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:H

Details

CWE
CWE-191 CWE-680
Status published
Products (1)
zephyrproject/zephyr 2.4.0 - 2.5.0
Published Oct 12, 2021
Tracked Since Feb 18, 2026