---
id: CVE-2025-67268
title: >-
  gpsd before commit dc966aa contains a heap-based out-of-bounds write
  vulnerability in the drivers/driver_nmea2000.c file
summary: >-
  gpsd before commit dc966aa contains a heap-based out-of-bounds write
  vulnerability in the drivers/driver_nmea2000.c file. The hnd_129540 function,
  which handles NMEA2000 PGN 129540 (GNSS Satellites in View) packets, fails to
  validate the…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
  - CWE-1285
vendor: gpsd_project
product: gpsd
affected:
  - gpsd < 3.27.1
patched:
  - gpsd 3.27.1
published: '2026-01-02'
updated: '2026-06-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-67268'
references:
  - url: 'https://github.com/Jaenact/gspd_cve/blob/main/CVE-2025-67268/README.md'
    label: cve@mitre.org
  - url: 'https://github.com/ntpsec/gpsd/blob/master/drivers/driver_nmea2000.c'
    label: cve@mitre.org
  - url: >-
      https://github.com/ntpsec/gpsd/commit/dc966aa74c075d0a6535811d98628625cbfbe3f4
    label: cve@mitre.org
  - url: 'https://access.redhat.com/errata/RHSA-2026:0770'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:0771'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:1621'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2025-67268'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2426835'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-67268.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
epss: 0.00773
epssPercentile: 0.53758
ingestedAt: '2026-06-30T13:26:50.173Z'
---

## Overview

gpsd before commit dc966aa contains a heap-based out-of-bounds write vulnerability in the drivers/driver_nmea2000.c file. The hnd_129540 function, which handles NMEA2000 PGN 129540 (GNSS Satellites in View) packets, fails to validate the user-supplied satellite count against the size of the skyview array (184 elements). This allows an attacker to write beyond the bounds of the array by providing a satellite count up to 255, leading to memory corruption, Denial of Service (DoS), and potentially arbitrary code execution.

## Affected

- `gpsd < 3.27.1`

## Remediation

Upgrade past the affected range:

- `gpsd 3.27.1`