Heap-based buffer overflow in the JJY refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the Telephone JJY time source to corrupt memory or crash ntpd via more than six time replies.

Metrics

No CVSS v4.0

Attack Vector Physical

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Ntpsec
  • Ntpsec

No data.

No data.

References
Link Providers
https://gitlab.com/NTPsec/ntpsec/-/commit/62a454f6fcb6f2dcc8d5866f6558905ebdb7dd69 cve-icon cve-icon
https://gitlab.com/NTPsec/ntpsec/-/work_items/895 cve-icon cve-icon
History

Wed, 21 Oct 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Ntpsec
Ntpsec ntpsec
Vendors & Products Ntpsec
Ntpsec ntpsec

Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Description Heap-based buffer overflow in the JJY refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the Telephone JJY time source to corrupt memory or crash ntpd via more than six time replies.
Title Heap-based Buffer Overflow in ntpsec
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitLab

Published: 2026-10-21T15:03:46.313Z

Updated: 2026-10-21T15:03:46.313Z

Reserved: 2026-09-29T09:30:08.025Z

Link: CVE-2026-102484

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-21T16:17:14.043

Modified: 2026-10-22T16:18:19.040

Link: CVE-2026-102484

cve-icon Redhat

No data.