Heap-based Buffer Overflow in ntpsec

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-102484
StatePUBLISHED
AssignerGitLab
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-21 16:17:14 UTC
Updated2026-10-22 16:18:19 UTC
DescriptionHeap-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.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

EPSS: 0.002640000 probability, percentile 0.173660000 (date 2026-10-22)

Problem Types: CWE-122 | CWE-122 CWE-122: Heap-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.4MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
3.1CNACVSS6.4MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
High

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA NTPsec Ntpsec affected 1.2.6 semver Not specified

References

ReferenceSourceLinkTags
gitlab.com/NTPsec/ntpsec/-/commit/62a454f6fcb6f2dcc8d5866f6558905ebdb7dd69 [email protected] gitlab.com
gitlab.com/NTPsec/ntpsec/-/work_items/895 [email protected] gitlab.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Tristan Madani (en)

Additional Advisory Data

Solutions

CNA: Upgrade to version 1.2.6

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