Vulnerability · Published Oct 21, 2026 · Assigned by GitLab
CVE-2026-102484Heap-based Buffer Overflow in ntpsec
Medium 6.4
In plain English
A medium-severity heap buffer overflow in ntpsec from NTPsec. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).
Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.2%top 89.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ntpsec | no fix listed | DEBIAN-CVE-2026-102484 |
| Debian:13 | ntpsec | no fix listed | DEBIAN-CVE-2026-102484 |
| Debian:14 | ntpsec | no fix listed | DEBIAN-CVE-2026-102484 |
| Ubuntu:22.04:LTS | ntpsec | no fix listed | UBUNTU-CVE-2026-102484 |
| Ubuntu:24.04:LTS | ntpsec | no fix listed | UBUNTU-CVE-2026-102484 |
| Ubuntu:26.04:LTS | ntpsec | no fix listed | UBUNTU-CVE-2026-102484 |
| Ubuntu:26.10 | ntpsec | no fix listed | UBUNTU-CVE-2026-102484 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H