CVE-2026-102823

CVE-2026-102823 · russh: Client-side channel-scoped Handler callbacks fire for channel IDs the client never opened

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Russh is a Rust SSH client and server library. Prior to 0.63.1, client_read_authenticated in russh/src/client/encrypted.rs forwards CHANNEL_DATA, CHANNEL_EXTENDED_DATA, CHANNEL_EOF, CHANNEL_CLOSE, CHANNEL_OPEN_FAILURE, CHANNEL_SUCCESS, CHANNEL_FAILURE, and CHANNEL_REQUEST subtypes exit-status, exit-signal, and xon-xoff to public client::Handler callbacks without confirming that the ChannelId belongs to a channel the client opened and established. A malicious SSH server can send lifecycle events for predicted, unopened, unconfirmed, or released channel identifiers, causing application panics or corrupting command completion and exit-code tracking. This issue is fixed in version 0.63.1.

CVSS 7.5 · Высокий · EPSS 0,3% · Есть исправление

Опубликовано

2026-09-29T18:25:58.084Z

Обновлено

2026-10-02T12:20:10.605Z

Стек: system

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