CVE-2026-102484

Heap-based Buffer Overflow in ntpsec

Published Oct 21, 2026 CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Upgrade to version 1.2.6

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitLab
Published
Updated
Oct 29, 2026, 8:57 PM
Reserved
Sep 29, 2026, 9:30 AM
Status
Awaiting Analysis
Published
Oct 21, 2026, 4:17 PM
Modified
Oct 29, 2026, 9:17 PM