CVE-2026-73429
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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.3
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS probability
- 0.29%
- CWE
- CWE-704, CWE-754
- Published
- 2026-08-12
- Last modified
- 2026-08-14
Affected products
- Eugeny russh
Weakness type
Related vulnerabilities
- CVE-2026-87546 — Incorrect type conversion or cast in Safebrowsing in Google Chrome on on Mac prior to 153.0.8010.36...
- CVE-2026-69585 — Microsoft Windows Search Component Elevation of Privilege Vulnerability
- CVE-2026-50278 — iccDEV: CIccEmbedIO::Read8() size_t underflow
- CVE-2026-10080 — Boards plugin panics on WebSocket command with non-string field types
- CVE-2026-15826 — User Profile Builder <= 3.16.4 - Unauthenticated Authentication Bypass via Type Confusion to Administrator Account Takeover via 'username' Parameter
- CVE-2026-53798 — rsync < 3.5.0 Privilege Confusion via name-converter uid/gid mapping
- CVE-2026-18675 — Kong Mesh: control plane denial of service via a malformed dataplane token with a non-string JWT kid
- CVE-2026-50337 — Windows Notification Elevation of Privilege Vulnerability