{"id":"EUVD-2026-111389","revision":"73394bfa1c62456f9d2457dfa0d7e0db","records":[{"revision":"73394bfa1c62456f9d2457dfa0d7e0db","observedAt":"2026-10-30T23:48:09.501+00:00","statement":{"source":"euvd","id":"EUVD-2026-111389","aliases":["CVE-2026-116774"],"title":"russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. From 0.60.0 until 0.65.0, channel-open parsing accepts a peer-declared maximum_packet_size of zero and passes it into ChannelTx::poll_writable…","description":"russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. From 0.60.0 until 0.65.0, channel-open parsing accepts a peer-declared maximum_packet_size of zero and passes it into ChannelTx::poll_writable in russh/src/channels/io/tx.rs. The Channel::data, Channel::make_writer, and Channel::into_stream asynchronous write paths then calculate a writable size of zero and remain pending forever because window adjustments cannot satisfy a static zero packet maximum. An authenticated client can strand server writes, and a malicious server can strand client writes, allowing affected tasks, channels, and connections to accumulate without surfacing an error. This issue is fixed in version 0.65.0.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","score":4.3,"severity":null}],"references":["https://github.com/Eugeny/russh/security/advisories/GHSA-fw5c-8223-6h42","https://github.com/Eugeny/russh/commit/39cb9dbaa37caf555d34c6c22efa3bbbff9e186c","https://github.com/Eugeny/russh/releases/tag/v0.65.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-111389","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 27, 2026, 8:25:26 PM","dateUpdated":"Oct 28, 2026, 4:13:18 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-111389","identifiers":["EUVD-2026-111389","CVE-2026-116774"]},"retained":false,"historicalAffected":[]}],"coverage":[]}