{"id":"CVE-2026-66374","aliases":["DEBIAN-CVE-2026-66374","EUVD-2026-48763","GHSA-pw7g-jh5j-6w4m","UBUNTU-CVE-2026-66374"],"status":"published","title":"Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the...","description":"Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00624,"percentile":0.504,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-1284"],"published":"2026-07-25T00:28:34Z","modified":"2026-10-25T09:47:31Z","exploits":[{"source":"pocgithub","id":"venglin/knot-doq","title":"venglin/knot-doq","date":"2026-07-23","url":"https://github.com/venglin/knot-doq"}],"fixes":[{"ecosystem":"Debian:14","package":"knot-resolver","fixed_in":["6.4.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:14","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.1-1"}]}],"versions":["5.7.5-1","6.0.10-1","6.0.12-1","6.0.13-1","6.0.14-1","6.0.15-1","6.0.15-2","6.0.15-3","6.0.15-4","6.0.17-1","6.0.9-1","6.1.0-1","6.1.0-2","6.2.0-1","6.2.0-2","6.3.0-1","6.4.0-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0~beta2-123-g6134920-1","1.0.0~beta3-1","1.0.0~beta3-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.3-1","1.5.0-4","1.5.1-1","1.5.2-1","2.0.0-3","2.1.0-1","2.1.0-2","2.1.1-1","2.1.1-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.1-3","3.2.1-3ubuntu1","3.2.1-3ubuntu2","3.2.1-3ubuntu2.1","3.2.1-3ubuntu2.2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.1-1","5.4.2-1","5.4.3-1","5.4.4-1","5.4.4-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.6.0-1.1","5.7.0-1build1","5.7.1-1","5.7.2-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.7.5-1","6.0.15-4build1","6.0.17-1","6.2.0-2"]}],"products":[{"vendor":"nic","product":"knot resolver"}],"references":[{"url":"https://openwall.com/lists/oss-security/2026/07/23/6","tags":["report"]},{"url":"https://github.com/venglin/knot-doq","tags":["exploit","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66374"},{"url":"https://github.com/advisories/GHSA-pw7g-jh5j-6w4m"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-66374","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-66374","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-66374","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-66374","description":"Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.","status":"published","published":"2026-07-25T00:28:34.32Z","modified":"2026-07-27T14:36:16.215Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T14:20:12.939084Z"}],"euvd":[{"id":"EUVD-2026-48763","description":"Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.","status":"published","published":"2026-07-25T00:28:34Z","modified":"2026-07-27T14:36:16Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T18:19:37.322622Z"}],"ghsa":[{"id":"GHSA-pw7g-jh5j-6w4m","title":"Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the...","description":"Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.","status":"published","published":"2026-07-25T03:30:54Z","modified":"2026-07-25T03:30:55Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L","level":"high"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T15:09:49.369416Z"}],"nvd":[{"id":"CVE-2026-66374","description":"Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.","status":"published","published":"2026-07-25T01:16:26.423Z","modified":"2026-10-24T13:10:00.147Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L","level":"high","assessor":"secondary"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T14:12:32.830533Z"}],"osv":[{"id":"DEBIAN-CVE-2026-66374","description":"Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.","status":"published","published":"2026-07-25T01:16:26.423Z","modified":"2026-10-25T09:47:31.773591142Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T15:45:58.699079Z"},{"id":"UBUNTU-CVE-2026-66374","description":"Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.","status":"published","published":"2026-07-25T01:16:00Z","modified":"2026-07-29T08:01:44Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T16:56:53.710209Z"}]}}
