---
id: CVE-2026-1681
title: >-
  Issuing an ICMP ping via the `net ping` shell command to a device's own IPv4
  address causes the network stack to recursively re-enter the input path on the
  same system work-queue stack
summary: >-
  Issuing an ICMP ping via the `net ping` shell command to a device's own IPv4
  address causes the network stack to recursively re-enter the input path on the
  same system work-queue stack. Because the destination is recognized as a local
  ad…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'
cwe:
  - CWE-674
  - CWE-787
vendor: zephyrproject
product: zephyr
affected:
  - zephyr <= 4.3.0
published: '2026-05-12'
updated: '2026-07-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-1681'
references:
  - url: >-
      https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-6fcc-8rwr-w7xx
    label: vulnerabilities@zephyrproject.org
tags:
  - nvd
epss: 0.00144
epssPercentile: 0.03046
ingestedAt: '2026-07-08T13:51:10.750Z'
---

## Overview

Issuing an ICMP ping via the `net ping` shell command to a device's own IPv4 address causes the network stack to recursively re-enter the input path on the same system work-queue stack. Because the destination is recognized as a local address, both the echo request and the resulting echo reply are processed inline before the current frame returns. The nested input-path frames exceed the work-queue stack and trigger a stack overflow.

## Affected

- `zephyr <= 4.3.0`

## Remediation

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