UBUNTU-CVE-2026-116696

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Source
https://ubuntu.com/security/CVE-2026-116696
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116696.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-116696
Upstream
Published
2026-10-27T21:18:00Z
Modified
2026-10-28T20:17:45Z
Severity
  • 3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.65.0, russh::keys::agent::server::serve in russh/src/keys/agent/server.rs accepts repeated SSH_AGENT_CONSTRAIN_CONFIRM records while adding a key and appends every Constraint::Confirm record to the key's retained constraint vector without a count or memory limit. A process that can connect to the agent socket, including the remote side of a forwarded agent session, can repeatedly add constrained keys and cause renewable memory growth that persists for the process lifetime because keys without a lifetime constraint do not expire. This issue is fixed in version 0.65.0.

References

Affected packages

Ubuntu:26.10 / rust-russh

Package

Name
rust-russh
Purl
pkg:deb/ubuntu/rust-russh?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.57.1-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "librust-russh-dev",
            "binary_version":  "0.57.1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116696.json"