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CVE-2026-102484— Heap-based Buffer Overflow in ntpsec

Quick assessment

Affected
NTPsec ntpsec
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 NTPsec 的 ntpd 1.2.6 之前版本中，JJY 参考时钟驱动存在基于堆的缓冲区溢出漏洞。若攻击者能够控制 Telephone JJY 时间源，则可通过发送超过六个时间响应，导致内存被破坏或 ntpd 进程崩溃。

CVSS 6.4 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-102484

Vulnerability Information
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Vulnerability Title
Heap-based Buffer Overflow in ntpsec
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
NTPsec ntpsec 0 ~ 1.2.6 -

II. Public POCs for CVE-2026-102484

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III. Intelligence Information for CVE-2026-102484

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Other References for CVE-2026-102484 (2)

Same Patch Batch · NTPsec · 2026-10-21 · 4 CVEs total

CVE-2026-102486 7.5 HIGH Out-of-bounds Read in ntpsec
CVE-2026-102483 7.5 HIGH Reachable Assertion in ntpsec
CVE-2026-102485 5.2 MEDIUM Out-of-bounds Read in ntpsec

IV. Related Vulnerabilities

Same product: ntpsec
Same vendor: NTPsec
Same weakness: CWE-122

V. Comments for CVE-2026-102484

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