Resource exhaustion in ntpd-rs - CVE-2026-26076
Published: April 24, 2026
Vulnerability identifier: #VU127487
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-26076
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the NTS packet handling functionality when processing malformed NTS packets that request a large number of cookies. A remote attacker can send specially crafted packets to cause a denial of service.
Only servers with NTS enabled are vulnerable.
Affected software
ntpd-rs
Fedora
ntpd-rs
Fedora
ntpd-rs
How to mitigate CVE-2026-26076
Install security update from vendor's website.
ntpd-rs - update to 1.7.1
ntpd-rs - addressed in versions 1.7.1-1.el10_1, 1.7.1-1.el10_2, 1.7.1-1.el10_3, 1.7.1-1.fc42, 1.7.1-1.fc43, 1.7.1-1.fc44
ntpd-rs - addressed in versions 1.7.1-1.el10_1, 1.7.1-1.el10_2, 1.7.1-1.el10_3, 1.7.1-1.fc42, 1.7.1-1.fc43, 1.7.1-1.fc44