What is CVE-2026-10644?

CVE-2026-10644 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 4.2/10. Published 2026-06-28.

How severe is CVE-2026-10644?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2026-10644

The Microchip SERCOM-G1 UART driver (drivers/serial/uart_mchp_sercom_g1.c), used by the PIC32CM-JH SoC family, contains an out-of-bounds write in its asynchronous (DMA) receive path. When uart_rx_enable() is invoked with a one-byte receive…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (4.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L.

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-2026-10644?: CVE-2026-10644 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 4.2/10. Published 2026-06-28.
How severe is CVE-2026-10644?: Medium severity. CVSS v3 base score is 4.2 out of 10.