CVE-2021-3323

PoC —

CVSS 3.1

9.8 critical

EPSS

<1%p59

Published

Oct 12, 2021 (Oct 12, 2021)

Modified

Jun 17, 2026

Description

Integer Underflow in 6LoWPAN IPHC Header Uncompression in Zephyr. Zephyr versions >= >=2.4.0 contain Integer Underflow (Wrap or Wraparound) (CWE-191). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-89j6-qpxf-pfpc

Vendors: zephyrproject
Products: zephyr
Weakness: CWE-191
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.9%)

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