{"id":"CVE-2025-29908","aliases":["GHSA-hqqc-jr88-p6x2"],"url":"https://o3.security/vulnerability/CVE-2025-29908","summary":"Netty QUIC hash collision DoS attack","details":"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.","published":"2025-03-31T18:43:44.172Z","modified":"2026-07-22T04:01:43.994678Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.netty.incubator:netty-incubator-codec-quic","fixedVersion":"0.0.71.Final"}],"fix":{"url":"https://github.com/netty/netty-incubator-codec-quic/commit/e059bd9b78723f8b035e0c547e42ce263f03461c","label":"netty/netty-incubator-codec-quic@e059bd9"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/29xxx/CVE-2025-29908.json"},{"type":"ADVISORY","url":"https://github.com/netty/netty-incubator-codec-quic/security/advisories/GHSA-hqqc-jr88-p6x2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-29908"},{"type":"FIX","url":"https://github.com/netty/netty-incubator-codec-quic/commit/e059bd9b78723f8b035e0c547e42ce263f03461c"},{"type":"PACKAGE","url":"https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-22T04:01:43.994678Z"}}