Vulnerability · Published Feb 12, 2026 · Assigned by GitHub_M
CVE-2026-26076ntpd-rs affected by excessive CPU load from malformed packets
Medium 6.9
In plain English
A medium-severity resource allocation without limits in ntpd-rs from pendulum-project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | rust-ntp-proto | 1.4.0-4+deb13u1 | DEBIAN-CVE-2026-26076 |
| Debian:14 | rust-ntp-proto | 1.7.1-1 | DEBIAN-CVE-2026-26076 |
| Ubuntu:24.04:LTS | rust-ntpd | no fix listed | UBUNTU-CVE-2026-26076 |
| Ubuntu:25.10 | rust-ntpd | no fix listed | UBUNTU-CVE-2026-26076 |
| Ubuntu:26.04:LTS | rust-ntpd | no fix listed | UBUNTU-CVE-2026-26076 |
| Ubuntu:26.10 | rust-ntpd | no fix listed | UBUNTU-CVE-2026-26076 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pendulum-project | ntpd-rs | < 1.7.1 |
Weakness: CWE-770 · Vector: 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