CVE-2026-18321
Publication date 31 July 2026
Last updated 7 August 2026
Ubuntu priority
Description
Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| ntpsec | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
4.7 · Medium
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H