CVE-2020-10019: Buffer Overflow in USB DFU requested length

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-05-11 · updated 2026-06-17
Weakness: CWE-120

Description

USB DFU has a potential buffer overflow where the requested length (wLength) is not checked against the buffer size. This could be used by a malicious USB host to exploit the buffer overflow. See NCC-ZEP-002 This issue affects: zephyrproject-rtos zephyr version 1.14.1 and later versions. version 2.1.0 and later versions.

Affected products

zephyrproject zephyr: before 1.14.2; from 2.0.0 through 2.1.0 — fixed in 1.14.2

How to fix

Upgrade to a fixed version: zephyrproject zephyr 1.14.2. Check the vendor advisory for mitigations.

References

https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10019
https://github.com/zephyrproject-rtos/zephyr/pull/23190
https://github.com/zephyrproject-rtos/zephyr/pull/23457
https://github.com/zephyrproject-rtos/zephyr/pull/23460
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-25
https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10019
https://github.com/zephyrproject-rtos/zephyr/pull/23190
https://github.com/zephyrproject-rtos/zephyr/pull/23457
https://github.com/zephyrproject-rtos/zephyr/pull/23460
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-25

Get alerted when CVE-2020-10019 or the next vulnerability affects your stack