Incorrect Type Conversion or Cast Affecting rust-russh package, versions <0.64.1-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-RUSTRUSSH-18757425
- published13 Aug 2026
- disclosed12 Aug 2026
Introduced: 12 Aug 2026
CVE-2026-73429 (opens in a new tab)How to fix?
Upgrade Debian:unstable rust-russh to version 0.64.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rust-russh package and not the rust-russh package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Russh is a Rust SSH client & server library. Prior to 0.62.4, a malicious SSH server can crash a russh client session with a malformed KEX_ECDH_REPLY containing a server ephemeral value that is not 32 bytes long. The client-side Curve25519Kex::compute_shared_secret function in russh/src/kex/curve25519.rs passes the decoded exchange.server_ephemeral value to clone_from_slice without validating its length, causing a deterministic panic before the server host key is verified. The panic terminates the spawned client session task and surfaces as a JoinError, while the embedding process normally remains running. This issue is fixed in version 0.62.4.