What is CVE-2026-10669?

CVE-2026-10669 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-07-14.

How severe is CVE-2026-10669?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2026-10669

On Xtensa SoCs built with CONFIG_XTENSA_MPU and CONFIG_USERSPACE, arch_buffer_validate() in arch/xtensa/core/mpu.c — the architecture hook that verifies a user-mode-supplied buffer is accessible to the calling user thread with the requeste…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Zephyrproject Zephyr — versions 3.7.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

vulnerabilities@zephyrproject.org (patch)
vulnerabilities@zephyrproject.org

Frequently asked questions

What is CVE-2026-10669?: CVE-2026-10669 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-07-14.
How severe is CVE-2026-10669?: High severity. CVSS v3 base score is 7.8 out of 10.