---
id: CVE-2026-1679
title: 'net: eswifi socket send payload length not bounded'
summary: >-
  The eswifi socket offload driver copies user-provided payloads into a fixed
  buffer without checking available space; oversized sends overflow
  `eswifi->buf`, corrupting kernel memory (CWE-120). Exploit requires local code
  that can call th…
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-120
vendor: zephyrproject-rtos
product: Zephyr
affected:
  - Zephyr < 4.4.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-04-01T13:51:46.860445Z'
exploitAvailable: true
published: '2026-03-27'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:10:22.956Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-1679'
references:
  - url: >-
      https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-qx3g-5g22-fq5w
tags:
  - cve.org
  - exploit-available
epss: 0.00215
epssPercentile: 0.11103
ingestedAt: '2026-10-15T22:48:25.573Z'
---

## Overview

The eswifi socket offload driver copies user-provided payloads into a fixed buffer without checking available space; oversized sends overflow `eswifi->buf`, corrupting kernel memory (CWE-120). Exploit requires local code that can call the socket send API; no remote attacker can reach it directly.

## Affected

- `Zephyr < 4.4.0`

## Remediation

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