{"id":"RUSTSEC-2026-0340","revision":"86f5ca67d4334a8290c89673a8499634","records":[{"revision":"86f5ca67d4334a8290c89673a8499634","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"RUSTSEC-2026-0340","aliases":["GHSA-3g6h-r5qx-f6hq"],"title":"Peer minimum ACK delay can panic quinn-proto when ACK_FREQUENCY transmission is enabled","description":"When sending ACK_FREQUENCY frames is enabled through\n`TransportConfig::ack_frequency_config(Some(..))`, the peer's transport parameters could cause\n`AckFrequencyState::candidate_max_ack_delay` to call `Duration::clamp` with a minimum greater\nthan its maximum, which panics.\n\nFor example, a peer advertising a `min_ack_delay` of 100,000 microseconds and a `max_ack_delay`\nof 100 milliseconds passes transport parameter validation. At a 5 ms RTT, the lower bound of the\nclamp becomes 100 ms while the upper bound is 25 ms, violating the precondition of `clamp` and\npanicking while driving the connection. Both automatically derived and explicitly configured\nmaximum ACK delays use this calculation.\n\nSending ACK_FREQUENCY frames is disabled by default, so only endpoints that opt in are affected.\n\nThe flaw was corrected in 0.11.18 by computing the delay with explicit minimum and maximum bounds\ninstead of `clamp`.\n\nThanks to [@zerox80](https://github.com/zerox80) for reporting this issue.","state":0,"publishedAt":"2026-09-14T12:00:00+00:00","modifiedAt":"2026-10-12T18:15:01.9754783+00:00","affected":[{"ecosystem":"crates.io","name":"quinn-proto","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.11.0"},{"kind":"fixed","version":"0.11.18"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null}],"references":["https://crates.io/crates/quinn-proto","https://rustsec.org/advisories/RUSTSEC-2026-0340.html","https://github.com/quinn-rs/quinn/pull/2868"],"sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0340","license":"OSV · upstream source license applies","key":"osv:RUSTSEC-2026-0340","identifiers":["RUSTSEC-2026-0340","GHSA-3g6h-r5qx-f6hq"]},"retained":false,"historicalAffected":[]}],"coverage":[]}