What is the CVSS score of CVE-2026-4179?

CVE-2026-4179 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H. EPSS exploitation probability: 0.0%.

Which versions of Zephyr are affected by CVE-2026-4179?

CVE-2026-4179 presents moderate security risk rated CVSS 6.1. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-4179?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Zephyr CVE-2026-4179

EUVD-2026-12190 MEDIUM

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

2026-03-14 zephyr

Denial Of Service Zephyr

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

High

Lifecycle Timeline

EUVD ID Assigned

Mar 14, 2026 - 23:00 euvd

EUVD-2026-12190

Analysis Generated

Mar 14, 2026 - 23:00 vuln.today

CVE Published

Mar 14, 2026 - 21:51 nvd

MEDIUM 6.1

DescriptionCVE.org

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

AnalysisAI

The STM32 USB device driver in Zephyr contains a logic error that can trigger an infinite loop, allowing a local attacker with user-level privileges to cause a denial of service by halting system responsiveness. No patch is currently available for this medium-severity defect that affects the USB subsystem's operational stability.

Technical ContextAI

The vulnerability resides in the Zephyr Project RTOS USB device controller driver for STM32 microcontrollers (drivers/usb/device/usb_dc_stm32.c). The root cause is classified as CWE-835 (Infinite Loop), a control flow weakness where improper loop termination conditions allow execution to enter an unbounded loop. This driver handles USB device enumeration and communication on embedded ARM Cortex-M based STM32 platforms. The infinite loop likely occurs during USB endpoint handling, interrupt processing, or transfer completion routines where a condition check fails to properly exit loop logic, causing the CPU to spin indefinitely and render the embedded device unresponsive. CPE cpe:2.3:a:zephyrproject-rtos:zephyr indicates this affects the Zephyr Project RTOS (all versions through 4.3).