CVE-2026-116774

The record

russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. From 0.60.0 until 0.65.0, channel-open parsing accepts a peer-declared maximum_packet_size of zero and passes it into ChannelTx::poll_writable in russh/src/channels/io/tx.rs. The Channel::data, Channel::make_writer, and Channel::into_stream asynchronous write paths then calculate a writable size of zero and remain pending forever because window adjustments cannot satisfy a static zero packet maximum. An authenticated client can strand server writes, and a malicious server can strand client writes, allowing affected tasks, channels, and connections to accumulate without surfacing an error. This issue is fixed in version 0.65.0.

Affected packages

Related vulnerabilities

• CVE-2026-63341 Aedes is an MQTT broker that can run on any stream server. CWE-400
• CVE-2026-62300 Filecoin Pin is an IPFS Pinning Service API implementation that pins to Filecoin's PDP… CWE-400
• CVE-2026-62254 LibreDWG is a free C library to read and write DWG files. CWE-400
• CVE-2026-62250 LibreDWG is a free C library to read and write DWG files. CWE-400
• CVE-2026-62303 Pistache is a high-performance REST toolkit written in C++. CWE-400
• CVE-2026-62160 Daptin is a GraphQL/JSON-API headless CMS. CWE-400
• CVE-2026-61848 Crass is a Ruby CSS parser that's fully compliant with the CSS Syntax Level 3… CWE-400
• CVE-2026-61854 VoiceSentinel is a real-time voice moderation system for Minecraft servers. CWE-400