{"id":"CVE-2025-61684","state":"PUBLISHED","title":"Quicly has assertion failures","description":"Quicly, an IETF QUIC protocol implementation, is susceptible to a denial-of-service attack prior to commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e. A remote attacker can exploit these bugs to trigger an assertion failure that crashes process using Quicly. Commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e fixes the issue.","publishedAt":"2026-01-19T15:18:11.398Z","updatedAt":"2026-01-20T15:49:59.004Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["h2o quicly"],"affected":[{"vendor":"h2o","product":"quicly","versions":[{"version":"< d9d3df6","status":"affected"}]}],"references":["https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9","https://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:09:48.677Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/61xxx/CVE-2025-61684.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-61684","state":"PUBLISHED","datePublished":"2026-01-19T15:18:11.398Z","dateUpdated":"2026-01-20T15:49:59.004Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-09-29T20:25:16.182Z"},"containers":{"cna":{"title":"Quicly has assertion failures","descriptions":[{"lang":"en","value":"Quicly, an IETF QUIC protocol implementation, is susceptible to a denial-of-service attack prior to commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e. A remote attacker can exploit these bugs to trigger an assertion failure that crashes process using Quicly. Commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e fixes the issue."}],"affected":[{"vendor":"h2o","product":"quicly","versions":[{"version":"< d9d3df6","status":"affected"}]}],"references":[{"url":"https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9","name":"https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e","name":"https://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20: Improper Input Validation","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-01-19T15:18:11.398Z"},"source":{"advisory":"GHSA-wr3c-345m-43v9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-20T15:49:39.447750Z","id":"CVE-2025-61684","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-20T15:49:59.004Z"}}]}}}