Buffer overflow in Ntpsec
CVE-2026-102484
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-102484?
- CVE-2026-102484 is a medium-severity vulnerability in Ntpsec, classified under Heap-based Buffer Overflow. CVSS score: 6.4/10. Published 2026-10-21.
- How severe is CVE-2026-102484?
- Medium severity. CVSS v3 base score is 6.4 out of 10.