{"schema":"threatline.record/2","record":{"id":"CVE-2026-116773","aliases":["GHSA-4p9f-7p9m-5vfg"],"summary":"russh's SSH client is susceptible to unbounded allocations via EXT_INFO packets","details":"russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.65.0, the client Session::process_packet path in russh/src/client/encrypted.rs accepts repeated packets encoded with russh's private msg::EXT_INFO = 7 before authentication, while the standards-compliant EXT_INFO message number 82 does not reach the affected handler. The handle_ext_info function appends every parsed extension name to received_extensions without clearing, deduplicating, or bounding the vector. A malicious SSH server that deliberately sends private message number 7 can therefore retain an unbounded number of attacker-controlled extension names for the session lifetime, causing progressive client memory exhaustion. This issue is fixed in version 0.65.0.","categories":["Unclassified"],"product":"russh","vendor":"Eugeny","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116773","source_modified_at":"2026-10-27T20:23:47.305Z","fetched_at":"2026-10-27T21:14:11.489891Z","product":"russh","vendor":"Eugeny","versions":[{"version":"< 0.65.0","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":4.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-27T20:23:25.559Z","modified_at":"2026-10-27T20:23:47.305Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-116773","fetched_at":"2026-10-27T21:14:11.489891Z","source_modified_at":"2026-10-27T20:23:47.305Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/Eugeny/russh/security/advisories/GHSA-4p9f-7p9m-5vfg","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/Eugeny/russh/commit/b33e93beec393e6d29eee69c1b8831736724ee75","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/Eugeny/russh/releases/tag/v0.65.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-27T20:23:47.305Z","content_hash":"d0cac3a433930fa63047c68c9368e8f595b89bc84e1c8b611b47d536012d3358"}}