What is CVE-2026-10665?

CVE-2026-10665 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 7.4/10. Published 2026-07-12.

How severe is CVE-2026-10665?

High severity. CVSS v3 base score is 7.4 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2026-10665

In Zephyr's WireGuard subsystem (subsys/net/lib/wireguard), wg_process_data_message() in wg_crypto.c linearizes an inbound transport-data payload into a fixed pool buffer of CONFIG_WIREGUARD_BUF_LEN bytes before decryption. The call net_bu…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Zephyrproject Zephyr — versions 4.4.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2026-10665?: CVE-2026-10665 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 7.4/10. Published 2026-07-12.
How severe is CVE-2026-10665?: High severity. CVSS v3 base score is 7.4 out of 10.