CVE WatchOct 19, 2026

CVE-2026-111061

russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.64.1, the agent server spawns a

CVSS

4.3

Medium

EPSS

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KEV

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Exploit Today

0-100

Published: Oct 19, 2026 · Last modified: Oct 19, 2026 · CWE-770

EPSS · 30d

Not enough EPSS history yet.

Technical description

russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.64.1, the agent server spawns a separate long-lived task for every SSH_AGENT_CONSTRAIN_LIFETIME record in a constrained add-key request. The loop accepts repeated lifetime records, clones the key blob into each task, and does not roll back tasks when later constraint parsing fails. An attacker that can speak the agent protocol locally or through agent forwarding can exhaust memory and tasks until the agent process is starved or terminated, denying SSH agent service. This issue is fixed in version 0.64.1.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

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