{"id":"CVE-2026-26076","aliases":["DEBIAN-CVE-2026-26076","EUVD-2026-6163","GHSA-c7j7-rmvr-fjmv","UBUNTU-CVE-2026-26076"],"status":"published","title":"ntpd-rs affected by excessive CPU load from malformed packets","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.","severity":{"version":"4.0","score":6.9,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00415,"percentile":0.36289,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-02-12T21:48:44Z","modified":"2026-11-04T02:47:35Z","fixes":[{"ecosystem":"Debian:13","package":"rust-ntp-proto","fixed_in":["1.4.0-4+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"rust-ntp-proto","fixed_in":["1.7.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"rust-ntp-proto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.0-4+deb13u1"}]}],"versions":["1.4.0-4"]},{"source":"osv","ecosystem":"Debian:14","package":"rust-ntp-proto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.1-1"}]}],"versions":["1.4.0-4","1.6.0-1","1.6.2-1","1.6.2-2","1.6.2-3","1.6.2-4"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"rust-ntpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-5","1.1.0-2","1.1.0-3","1.1.1-1","1.1.1-2","1.1.2-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"rust-ntpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.3-1build1","1.4.0-6"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"rust-ntpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.1-1","1.7.2-1","1.7.2-2","1.9.0-0ubuntu1","1.9.0-0ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"rust-ntpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.0-6","1.6.2-2","1.6.2-3","1.6.2-4","1.7.1-1"]}],"products":[{"vendor":"pendulum-project","product":"ntpd-rs"},{"vendor":"tweedegolf","product":"ntpd-rs"}],"references":[{"url":"https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-c7j7-rmvr-fjmv","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","report"]},{"url":"https://github.com/pendulum-project/ntpd-rs/commit/fa73af14d17b666b1142b9fee3ba22c18a841d24","tags":["x_refsource_MISC","Patch","fix","report"]},{"url":"https://github.com/pendulum-project/ntpd-rs/releases/tag/v1.7.1","tags":["x_refsource_MISC","Product","Release Notes","web","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26076.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26076","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-26076","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-26076","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-26076","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-26076","title":"ntpd-rs affected by excessive CPU load from malformed packets","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.","status":"published","published":"2026-02-12T21:48:44.651Z","modified":"2026-02-13T16:00:13.69Z","cvss":[{"version":"4.0","score":6.9,"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","level":"medium","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T13:38:20.971157Z"}],"euvd":[{"id":"EUVD-2026-6163","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.","status":"published","published":"2026-02-12T21:48:44Z","modified":"2026-02-13T16:00:13Z","cvss":[{"version":"4.0","score":6.9,"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","level":"medium"}],"updated_at":"2026-11-02T19:48:39.919829Z"}],"nvd":[{"id":"CVE-2026-26076","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.","status":"published","published":"2026-02-12T22:16:06.96Z","modified":"2026-06-17T10:25:41.643Z","cvss":[{"version":"4.0","score":6.9,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:05.908608Z"}],"osv":[{"id":"CVE-2026-26076","title":"ntpd-rs affected by excessive CPU load from malformed packets","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.","status":"published","published":"2026-02-12T21:48:44.651Z","modified":"2026-11-04T02:47:35.192586746Z","cvss":[{"version":"4.0","score":6.9,"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","level":"medium"}],"cwes":["CWE-770"],"updated_at":"2026-11-04T02:53:45.692342Z"},{"id":"DEBIAN-CVE-2026-26076","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.","status":"published","published":"2026-02-12T22:16:06.96Z","modified":"2026-10-01T03:03:08.988755458Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:53.877573Z"},{"id":"UBUNTU-CVE-2026-26076","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.","status":"published","published":"2026-02-12T22:16:00Z","modified":"2026-10-17T12:56:17.977868216Z","cvss":[{"version":"4.0","score":6.9,"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","level":"medium"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:08.726452Z"}]}}