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 req…
Exact source revision recorded 30 Oct 2026 01:56:14 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-104457
Publishedrussh 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.
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Original publisher date fields
datePublished: Oct 19, 2026, 4:30:24 PM
dateUpdated: Oct 19, 2026, 6:29:47 PM
- Source published
- Oct 19, 2026, 4:30:24 PM (timezone not stated)
- Source modified
- Oct 19, 2026, 6:29:47 PM (timezone not stated)
- Observed here
- 30 Oct 2026 01:56:14 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
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EUVD CVSS 3.1 · 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L