CVE-2021-3835: Buffer overflow in usb device class

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-02-07 · updated 2026-06-17
Weakness: CWE-122

Description

Buffer overflow in usb device class. Zephyr versions >= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fm6v-8625-99jf

Affected products

zephyrproject zephyr: from 2.6.0 before 2.7.1; 3.0.0-rc1, 3.0.0-rc2 — fixed in 2.7.1

How to fix

Upgrade to a fixed version: zephyrproject zephyr 2.7.1. Check the vendor advisory for mitigations.

References

http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fm6v-8625-99jf
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fm6v-8625-99jf

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