CVE-2019-6443: Ntpsec

Critical severity, CVSS 9.1. EPSS: 66.9% chance of exploitation in the next 30 days.

An issue was discovered in NTPsec before 1.1.3. Because of a bug in ctl_getitem, there is a stack-based buffer over-read in read_sysvars in ntp_control.c in ntpd.

Affected products

• Ntpsec Ntpsec: before 1.1.3 (fixed in 1.1.3)

Published 2019-01-16. Last modified 2026-06-17.