---
id: CVE-2026-4179
title: 'stm32: usb: Infinite while loop in Interrupt Handler'
summary: >-
  Issues in stm32 USB device driver (drivers/usb/device/usb_dc_stm32.c) can lead
  to an infinite while loop.
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-835
vendor: zephyrproject-rtos
product: Zephyr
affected:
  - Zephyr < 3.7.2
  - Zephyr >= 4.0.0 < 4.2.2
  - Zephyr >= 4.3.0 < 4.3.1
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-03-16T19:21:06.615239Z'
exploitAvailable: true
published: '2026-03-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:10:24.412Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-4179'
references:
  - url: >-
      https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-9xg7-g3q3-9prf
tags:
  - cve.org
  - exploit-available
epss: 0.00154
epssPercentile: 0.04071
ingestedAt: '2026-10-15T22:48:25.578Z'
---

## Overview

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

## Affected

- `Zephyr < 3.7.2`
- `Zephyr >= 4.0.0 < 4.2.2`
- `Zephyr >= 4.3.0 < 4.3.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.