What is CVE-2026-10678?

CVE-2026-10678 is a high-severity vulnerability in Zephyrproject Zephyr, classified under NULL Pointer Dereference. CVSS score: 8.1/10. Published 2026-07-21.

How severe is CVE-2026-10678?

High severity. CVSS v3 base score is 8.1 out of 10.

NULL pointer dereference in Zephyrproject Zephyr

CVE-2026-10678

The MCTP-over-I2C+GPIO target binding in Zephyr (subsys/pmci/mctp/mctp_i2c_gpio_target.c) processes pseudo-register writes from an I2C bus master byte-by-byte in mctp_i2c_gpio_target_write_received() without validating the order or the rec…

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Zephyrproject Zephyr — versions 4.3.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference
CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2026-10678?: CVE-2026-10678 is a high-severity vulnerability in Zephyrproject Zephyr, classified under NULL Pointer Dereference. CVSS score: 8.1/10. Published 2026-07-21.
How severe is CVE-2026-10678?: High severity. CVSS v3 base score is 8.1 out of 10.