CVEvulnerability

CVE-2026-73429

5.3 MEDIUM Published 2026-08-12 Modified 2026-10-24 Official page ↗
Status
Deferred
Published
2026-08-12
Last modified
2026-10-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-704, CWE-754

Description

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.

Related

Weakness · CWE (2)

  • CWE-704 Incorrect Type Conversion or Cast weakness
  • CWE-754 Improper Check for Unusual or Exceptional Conditions weakness

References