Reachable Assertion in ntpsec

published 2026-10-21 18 d ago modified 2026-10-29 10 d ago also EUVD-2026-107309

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

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.

Patch / fix

fixed in 1 distros 1 links 1

NTPsec ntpsec 1.2.6

ntpsec openSUSE Tumbleweed 1.2.6-1.1

opensuse advisories openSUSE-SU-2026:12229-1

gitlab.com/NTPsec/ntpsec@df83f3c commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-102483 updated 2026-11-05 cvss 7.5

ntpsec: ntpsec: Denial of Service via excessive NTS Cookie Placeholder extension fields

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 10 d ago (2026-10-29)

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

NTPsec ntpsec

Classification

Weakness

CWE-617 Reachable Assertion

References

Sources

CVE List CVE-2026-102483
NVD CVE-2026-102483

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary