CVE-2026-102484
Heap-based Buffer Overflow in ntpsec
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.
INFO
Published Date :
Oct. 21, 2026, 4:17 p.m.
Last Modified :
Oct. 21, 2026, 4:17 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | ceab7361-8a18-47b1-92ba-4d7d25f6715a | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update NTPsec ntpd to version 1.2.6 or later.
- Apply vendor-provided security patches.
- Ensure input validation for JJY time sources.
- Monitor network traffic for suspicious JJY replies.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-102484.
| URL | Resource |
|---|---|
| https://gitlab.com/NTPsec/ntpsec/-/commit/62a454f6fcb6f2dcc8d5866f6558905ebdb7dd69 | |
| https://gitlab.com/NTPsec/ntpsec/-/work_items/895 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-102484 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-102484
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-102484 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-102484 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Oct. 21, 2026
Action Type Old Value New Value 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. Added CVSS V3.1 AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H Added CWE CWE-122 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/102xxx/CVE-2026-102484.json">CVE-2026-102484</a> Added Reference https://gitlab.com/NTPsec/ntpsec/-/commit/62a454f6fcb6f2dcc8d5866f6558905ebdb7dd69 Added Reference https://gitlab.com/NTPsec/ntpsec/-/work_items/895