CVE-2026-73489

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/Eugeny/russh/commit/8912512371820167a12a0a638bd666856ce458ad
https://github.com/Eugeny/russh/releases/tag/v0.62.4
https://github.com/Eugeny/russh/security/advisories/GHSA-cqjc-rmpq-xprq
https://github.com/Eugeny/russh/security/advisories/GHSA-cqjc-rmpq-xprq

Configurations

No configuration.

History

24 Oct 2026, 15:10

Type	Values Removed	Values Added
Summary		(es) 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.

Information

Published : 2026-08-13 22:17

Updated : 2026-10-24 15:10

NVD link : CVE-2026-73489

Mitre link : CVE-2026-73489

CVE.ORG link : CVE-2026-73489

JSON object : View

Products Affected

No product.

CWE

CWE-129

Improper Validation of Array Index

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