CVE-2026-102483 PUBLISHED

Reachable Assertion in ntpsec

Assigner: GitLab
Reserved: 29.09.2026 Published: 21.10.2026 Updated: 21.10.2026

Reachable exit in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to terminate the daemon via an NTS request with excess NTS Cookie Placeholder extension fields.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	NTPsec
Product	ntpsec
Versions	Default: unaffected affected from 1.1.4 to 1.2.6 (excl.)

Solutions

Upgrade to version 1.2.6

Credits

William Burgess <wxb873@student.bham.ac.uk> finder

References

https://gitlab.com/NTPsec/ntpsec/-/work_items/899
https://gitlab.com/NTPsec/ntpsec/-/commit/df83f3c4f

Problem Types

CWE-617: Reachable Assertion CWE