rust-russh: Russh is a Rust SSH client and server library
CVE-2026-102821 is fixed in rust-russh on 1 platform by DEBIAN-CVE-2026-102821 (version 0.64.1-1), released October 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Russh is a Rust SSH client and server library. Prior to 0.63.2, an authenticated remote peer can send SSH_MSG_KEXINIT without the required SSH_MSG_KEX_ECDH_INIT and then flood SSH_MSG_CHANNEL_OPEN messages while SessionKexState::InProgress prevents priority_receiver in russh/src/server/session.rs from being drained. The server continues processing network input and enqueues a ChannelOpenReply for each request on an unbounded channel, allowing one connection to grow memory until the process is terminated. This issue is fixed in version 0.63.2.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| rust-russh · Debian 14 | 0.64.1-1 | DEBIAN-CVE-2026-102821 | Oct 16, 2026 |
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