CVE-2026-102483

Reachable Assertion in ntpsec

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.43%Down 0.2 points since Oct 22, 2026

What each source reports

CVE List Score used 7.5

Reachable Assertion in ntpsec

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.

Record: CVE-2026-102483
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-617
Updated: 2026-11-02

EUVDEUVD-2026-107309 7.5

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.

Record: EUVD-2026-107309
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-6xg3-q93h-wcgv 7.5

Reachable exit in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to terminate the...

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.

Record: GHSA-6xg3-q93h-wcgv
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-617
Updated: 2026-11-02

NVD 7.5

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.

Record: CVE-2026-102483
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-617
Updated: 2026-11-02

OSV 7.5

Reachable Assertion in ntpsec

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.

Record: CVE-2026-102483
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-617
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-102483 7.5

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.

Record: DEBIAN-CVE-2026-102483
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-102483 7.5

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.

Record: UBUNTU-CVE-2026-102483
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVopenSUSE-SU-2026:12229-1 No score

libntpc1-1.2.6-1.1 on GA media

These are all security issues fixed in the libntpc1-1.2.6-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:12229-1
Updated: 2026-11-02

Affected products

ntpsec

Affected packages

Affected packages
Package	Affected	Fixed
`ntpsec` Debian:12	All versions, plus listed versions 1.2.2+dfsg1-11.2.2+dfsg1-1+deb12u11.2.2+dfsg1-21.2.2+dfsg1-31.2.2+dfsg1-4 Show 10 moreShow less 1.2.3+dfsg1-11.2.3+dfsg1-21.2.3+dfsg1-31.2.3+dfsg1-41.2.3+dfsg1-51.2.3+dfsg1-61.2.3+dfsg1-71.2.3+dfsg1-81.2.4+dfsg-11.2.5+dfsg-1	None known
`ntpsec` Debian:13	All versions, plus listed versions 1.2.3+dfsg1-81.2.4+dfsg-11.2.5+dfsg-1	None known
`ntpsec` Debian:14	All versions, plus listed versions 1.2.3+dfsg1-81.2.4+dfsg-11.2.5+dfsg-1	None known
`ntpsec` Ubuntu:18.04:LTS	All versions, plus listed versions 1.0.0+dfsg1-11.0.0+dfsg1-31.1.0+dfsg1-11.1.0+dfsg1-1ubuntu0.11.1.0+dfsg1-1ubuntu0.2	None known
`ntpsec` Ubuntu:20.04:LTS	All versions, plus listed versions 1.1.3+dfsg1-21.1.7+dfsg1-11.1.7+dfsg1-21.1.8+dfsg1-11.1.8+dfsg1-31.1.8+dfsg1-41.1.8+dfsg1-4build1	None known
`ntpsec` Ubuntu:22.04:LTS	All versions, plus listed versions 1.2.0+dfsg1-41.2.1+dfsg1-21.2.1+dfsg1-31.2.1+dfsg1-3ubuntu11.2.1+dfsg1-4	None known
`ntpsec` Ubuntu:24.04:LTS	All versions, plus listed versions 1.2.2+dfsg1-21.2.2+dfsg1-31.2.2+dfsg1-41.2.2+dfsg1-4build11.2.2+dfsg1-4build2	None known
`ntpsec` Ubuntu:26.10	All versions, plus listed versions 1.2.3+dfsg1-8ubuntu21.2.3+dfsg1-8ubuntu3	None known
`ntpsec` Ubuntu:26.04:LTS	All versions, plus listed versions 1.2.3+dfsg1-8ubuntu11.2.3+dfsg1-8ubuntu2	None known
`ntpsec` openSUSE:Tumbleweed	before 1.2.6-1.1	1.2.6-1.1

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-102483 is a high vulnerability (CVSS 7.5) in Ntpsec, published October 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. Fixed in ntpsec 1.2.6-1.1.

References

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