{"id":"CVE-2026-73429","revision":"ffda70f4db794e609173d46b66e01703","records":[{"revision":"ffda70f4db794e609173d46b66e01703","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-73429","aliases":[],"title":"Russh: client wrong-length X25519 `clone_from_slice` panic (pre-auth DoS)","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. This issue is fixed in version 0.62.4.","state":0,"publishedAt":"2026-08-12T20:53:19.558+00:00","modifiedAt":"2026-08-14T22:15:45.159+00:00","affected":[{"ecosystem":"Vendor product","name":"russh","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Eugeny\",\n                    \"product\": \"russh\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.62.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/Eugeny/russh/security/advisories/GHSA-g9hv-x236-4qp3","https://github.com/Eugeny/russh/commit/a7fc1eb5717264e31c3c5f7dd849b73989a08f3d","https://github.com/Eugeny/russh/releases/tag/v0.62.4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-73429","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-73429","identifiers":["CVE-2026-73429"]},"retained":false,"historicalAffected":[]}],"coverage":[]}