What is CVE-2026-4179?

CVE-2026-4179 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.1/10. Published 2026-03-16.

How severe is CVE-2026-4179?

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

Vulnerability in Zephyrproject Zephyr

CVE-2026-4179

Issues in stm32 USB device driver (drivers/usb/device/usb_dc_stm32.c) can lead to an infinite while loop.

Published 2026-03-16 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.001 (3.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.001 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-9xg7-g3q3-9prf (Exploit, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-4179?: CVE-2026-4179 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.1/10. Published 2026-03-16.
How severe is CVE-2026-4179?: Medium severity. CVSS v3 base score is 6.1 out of 10.