What is CVE-2026-10663?

CVE-2026-10663 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Use After Free. CVSS score: 6.1/10. Published 2026-07-12.

How severe is CVE-2026-10663?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Use After Free in Zephyrproject Zephyr

CVE-2026-10663

In Zephyr's experimental USB host stack (CONFIG_USB_HOST_STACK), usbh_device_disconnect() (subsys/usb/host/usbh_device.c) freed the root usb_device slab object without clearing the cached pointer ctx->root. The bus removal handler dev_remo…

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Zephyrproject Zephyr — versions 4.4.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

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

Frequently asked questions

What is CVE-2026-10663?: CVE-2026-10663 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Use After Free. CVSS score: 6.1/10. Published 2026-07-12.
How severe is CVE-2026-10663?: Medium severity. CVSS v3 base score is 6.1 out of 10.