{"id":"CVE-2026-73489","sourceIdentifier":"security-advisories@github.com","published":"2026-08-13T22:17:26.893","lastModified":"2026-10-24T15:10:00.190","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"Russh is a Rust SSH client & server library. Prior to 0.62.4, an authenticated SSH client can cause a denial of service by sending a pty-req channel request with more than 130 terminal-mode records. The parser in russh/src/server/encrypted.rs stores terminal modes in a fixed 130-entry [(Pty::TTY_OP_END, 0); 130] array but continues increasing the mode count, then constructs an out-of-bounds slice and panics before the application pty_request handler runs. The panic terminates the server session task without causing memory corruption. This issue is fixed in version 0.62.4."},{"lang":"es","value":"Russh es una biblioteca de cliente y servidor SSH de Rust. Antes de la versión 0.62.4, un cliente SSH autenticado puede causar una denegación de servicio al enviar una solicitud de canal pty-req con más de 130 registros de modo de terminal. El analizador en russh/src/server/encrypted.rs almacena los modos de terminal en un array fijo de 130 entradas [(Pty::TTY_OP_END, 0); 130] pero continúa aumentando el recuento de modos, luego construye un slice fuera de límites y entra en pánico antes de que se ejecute el gestor de solicitud pty_request de la aplicación. El pánico termina la tarea de sesión del servidor sin causar corrupción de memoria. Este problema está solucionado en la versión 0.62.4."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"Eugeny","product":"russh","versions":[{"version":"< 0.62.4","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","baseScore":4.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":2.8,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-17T19:50:25.618015Z","id":"CVE-2026-73489","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-129"}]}],"references":[{"url":"https://github.com/Eugeny/russh/commit/8912512371820167a12a0a638bd666856ce458ad","source":"security-advisories@github.com"},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.62.4","source":"security-advisories@github.com"},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-cqjc-rmpq-xprq","source":"security-advisories@github.com"},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-cqjc-rmpq-xprq","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}