CVE-2021-3581: Zephyrproject Zephyr

High severity, CVSS 8.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Buffer Access with Incorrect Length Value in zephyr. Zephyr versions >= >=2.5.0 contain Buffer Access with Incorrect Length Value (CWE-805). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8q65-5gqf-fmw5

Affected products

• Zephyrproject Zephyr: from 2.5.0, before 2.6.0 (fixed in 2.6.0)

Published 2021-10-05. Last modified 2026-06-17.