Bug 2439531 (CVE-2026-26076) - CVE-2026-26076 ntpd-rs: ntpd-rs: Denial of Service via malformed NTS packets requesting excessive cookies
Summary: CVE-2026-26076 ntpd-rs: ntpd-rs: Denial of Service via malformed NTS packets ...
Keywords:
Status: NEW
Alias: CVE-2026-26076
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2439600 2439601 2439602
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-12 22:01 UTC by OSIDB Bzimport
Modified: 2026-02-12 23:23 UTC (History)
0 users

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Description OSIDB Bzimport 2026-02-12 22:01:17 UTC 
ntpd-rs is a full-featured implementation of the Network Time Protocol. Prior to 1.7.1, an attacker can remotely induce moderate increases (2-4 times above normal) in cpu usage. When having NTS enabled on an ntpd-rs server, an attacker can create malformed NTS packets that take significantly more effort for the server to respond to by requesting a large number of cookies. This can lead to degraded server performance even when a server could otherwise handle the load. This vulnerability is fixed in 1.7.1.
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