CVE-2021-3625

CRITICAL

Zephyr < 2.7.0 - Out-of-Bounds Write

Title source: rule

Description

Buffer overflow in Zephyr USB DFU DNLOAD. Zephyr versions >= v2.5.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-c3gr-hgvr-f363

Exploits (1)

nomisec WORKING POC 7 stars
by szymonh · poc
https://github.com/szymonh/zephyr_cve-2021-3625

References (1)

Scores

CVSS v3 9.6
EPSS 0.0556
EPSS Percentile 90.3%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H

Details

CWE
CWE-122 CWE-787
Status published
Products (1)
zephyrproject/zephyr 2.5.0 - 2.7.0
Published Oct 05, 2021
Tracked Since Feb 18, 2026