{"schemaVersion":3,"id":"CVE-2026-73429","aliases":["CGA-cmcx-g735-2723","CGA-jcm7-x4r5-gcpp","GHSA-g9hv-x236-4qp3","DEBIAN-CVE-2026-73429","UBUNTU-CVE-2026-73429"],"status":"published","duplicateOf":null,"title":null,"description":"Russh is a Rust SSH client & server library. Prior to 0.62.4, a malicious SSH server can crash a russh client session with a malformed KEX_ECDH_REPLY containing a server ephemeral value that is not 32 bytes long. The client-side Curve25519Kex::compute_shared_secret function in russh/src/kex/curve25519.rs passes the decoded exchange.server_ephemeral value to clone_from_slice without validating its length, causing a deterministic panic before the server host key is verified. The panic terminates the spawned client session task and surfaces as a JoinError, while the embedding process normally remains running. 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