Which products and versions are affected by CVE-2019-6444?

Affected: Ntpsec; ntpsec-utils (suse); python3-ntp (suse). The full list is in the CVE brief.

Is CVE-2019-6444 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2019-6444 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2019-6444?

Public exploit code is available.

Is there a fix for CVE-2019-6444?

Fixed versions are available, including Ntpsec 1.1.0+dfsg1-1ubuntu0.2, Ntpsec 1.1.3-lp150.2.3.1, Ntpsec 1.1.3-r0.

How urgently should CVE-2019-6444 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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WatchlistCritical

CVE-2019-6444Ntpsec Out-of-Bounds Read

process_control() in ntp_control.c has a stack-based buffer over-read because attacker-controlled data is dereferenced by ntohl() in ntpd.

Published Jan 16, 2019 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2019-6444, UBUNTU-CVE-2019-6444

Key Facts

Patch immediately

CVE-2019-6444 is a critical-severity vulnerability (CVSS 9.1 v3.1) affecting Ntpsec, ntpsec-utils (suse), python3-ntp (suse).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 46% probability of exploitation in the next 30 days.
Fixed versions are available, including Ntpsec 1.1.0+dfsg1-1ubuntu0.2, Ntpsec 1.1.3-lp150.2.3.1, Ntpsec 1.1.3-r0.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v3.1

9.1

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS (30-day exploit likelihood)

46%

Higher than 98.7% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

51/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

Description

An issue was discovered in NTPsec before 1.1.3. process_control() in ntp_control.c has a stack-based buffer over-read because attacker-controlled data is dereferenced by ntohl() in ntpd.

Affected Products

32 affected entries in total

Product	Affected versions	Fixed in
NtpsecNtpsec	See advisory	1.1.3
ntpsec-utilssuse	See advisory	1.1.3-lp150.2.3.1
python3-ntpsuse	See advisory	1.1.3-lp150.2.3.1

Patched Releases

Ntpsec

1.1.0+dfsg1-1ubuntu0.2, 1.1.3-lp150.2.3.1, 1.1.3-r0, 1.1.3+dfsg1-1, 1.1.3

ntpsec-utils

1.1.3-lp150.2.3.1

python3-ntp