---
id: CVE-2026-102485
title: Out-of-bounds Read in ntpsec
summary: >-
  Out-of-bounds read in the Motorola Oncore refclock driver in NTPsec ntpd
  before 1.2.6 allows an attacker who controls the GPS receiver's serial data to
  crash ntpd or disclose memory via a PPS Control (@@Gc) reply with an
  out-of-range mod…
severity: medium
cvss: 5.2
cvssVector: 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-125
vendor: NTPsec
product: ntpsec
affected:
  - ntpsec < 1.2.6
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T15:03:51.277Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-102485'
references:
  - url: 'https://gitlab.com/NTPsec/ntpsec/-/work_items/895'
  - url: >-
      https://gitlab.com/NTPsec/ntpsec/-/commit/22a09b3aec58831a9e4a008f3f22caa155f969c2
tags:
  - cve.org
ingestedAt: '2026-10-21T16:05:17.712Z'
---

## Overview

Out-of-bounds read in the Motorola Oncore refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the GPS receiver's serial data to crash ntpd or disclose memory via a PPS Control (@@Gc) reply with an out-of-range mode byte.

## Affected

- `ntpsec < 1.2.6`

## Remediation

Upgrade to version 1.2.6