{"id":"CVE-2025-29908","aliases":["EUVD-2025-9052","GHSA-hqqc-jr88-p6x2"],"status":"published","title":"Netty QUIC hash collision DoS attack","description":"Netty QUIC codec is a QUIC codec for netty which makes use of quiche. An issue was discovered in the codec. A hash collision vulnerability (in the hash map used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs). This vulnerability is fixed in 0.0.71.Final.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0059,"percentile":0.48572,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-407"],"published":"2025-03-31T18:43:44Z","modified":"2026-10-28T10:58:57Z","fixes":[{"ecosystem":"Maven","package":"io.netty.incubator:netty-incubator-codec-quic","fixed_in":["0.0.71.Final"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"io.netty.incubator:netty-incubator-codec-quic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.71.Final"}]}]},{"source":"osv","ecosystem":"Maven","package":"io.netty.incubator:netty-incubator-codec-quic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.71.Final"}]}],"versions":["0.0.1.Final","0.0.10.Final","0.0.11.Final","0.0.12.Final","0.0.13.Final","0.0.14.Final","0.0.15.Final","0.0.16.Final","0.0.17.Final","0.0.18.Final","0.0.19.Final","0.0.2.Final","0.0.20.Final","0.0.3.Final","0.0.4.Final","0.0.5.Final","0.0.6.Final","0.0.7.Final","0.0.8.Final","0.0.9.Final"]}],"products":[{"vendor":"netty","product":"netty-incubator-codec-quic"}],"references":[{"url":"https://github.com/netty/netty-incubator-codec-quic/security/advisories/GHSA-hqqc-jr88-p6x2","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/netty/netty-incubator-codec-quic/commit/e059bd9b78723f8b035e0c547e42ce263f03461c","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory","tags":["x_refsource_MISC","package","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-29908","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-hqqc-jr88-p6x2"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/29xxx/CVE-2025-29908.json","tags":["advisory"]},{"url":"https://github.com/netty/netty-incubator-codec-quic","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-29908","title":"Netty QUIC hash collision DoS attack","description":"Netty QUIC codec is a QUIC codec for netty which makes use of quiche. An issue was discovered in the codec. A hash collision vulnerability (in the hash map used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs). This vulnerability is fixed in 0.0.71.Final.","status":"published","published":"2025-03-31T18:43:44.172Z","modified":"2025-04-01T13:50:43.647Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T14:32:45.797843Z"}],"euvd":[{"id":"EUVD-2025-9052","description":"Netty QUIC codec is a QUIC codec for netty which makes use of quiche. An issue was discovered in the codec. A hash collision vulnerability (in the hash map used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs). This vulnerability is fixed in 0.0.71.Final.","status":"published","published":"2025-03-31T18:43:44Z","modified":"2025-04-01T13:50:43Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T20:52:45.844316Z"}],"ghsa":[{"id":"GHSA-hqqc-jr88-p6x2","title":"Netty QUIC hash collision DoS attack","description":"An issue was discovered in the codec. A hash collision vulnerability (in the hash map used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs).\n\nSee https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory","status":"published","published":"2025-03-31T21:47:20Z","modified":"2025-03-31T21:47:23Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T14:38:37.325334Z"}],"nvd":[{"id":"CVE-2025-29908","description":"Netty QUIC codec is a QUIC codec for netty which makes use of quiche. An issue was discovered in the codec. A hash collision vulnerability (in the hash map used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs). This vulnerability is fixed in 0.0.71.Final.","status":"published","published":"2025-03-31T19:15:40.367Z","modified":"2026-06-17T09:05:51.863Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T14:10:56.494516Z"}],"osv":[{"id":"CVE-2025-29908","title":"Netty QUIC hash collision DoS attack","description":"Netty QUIC codec is a QUIC codec for netty which makes use of quiche. An issue was discovered in the codec. A hash collision vulnerability (in the hash map used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs). This vulnerability is fixed in 0.0.71.Final.","status":"published","published":"2025-03-31T18:43:44.172Z","modified":"2026-10-28T10:58:57.350417871Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T15:44:47.708311Z"},{"id":"GHSA-hqqc-jr88-p6x2","title":"Netty QUIC hash collision DoS attack","description":"An issue was discovered in the codec. A hash collision vulnerability (in the hash map used to manage connections) allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs).\n\nSee https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory","status":"published","published":"2025-03-31T21:47:20Z","modified":"2025-03-31T22:10:24.71062Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T15:46:49.621585Z"}]}}