Improper Check for Unusual or Exceptional Conditions Affecting russh package, versions <0.62.4
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Test your applications- Snyk IDSNYK-RUST-RUSSH-18307420
- published25 Jul 2026
- disclosed24 Jul 2026
- creditUnknown
Introduced: 24 Jul 2026
New CVE NOT AVAILABLE CWE-754 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade russh to version 0.62.4 or higher.
Overview
Affected versions of this package are vulnerable to Improper Check for Unusual or Exceptional Conditions in the server_dh process when handling a peer public value consisting of all-zero bytes. An attacker can cause the server to panic and terminate the connection handler by sending a specially crafted SSH key exchange message with an all-zero Curve25519 public value before authentication. This is only exploitable if the server is running with the default configuration and no caller-supplied parameters are set.