← Vulnerability feed

Vulnerability record · CVE-2025-54804 · published 5 August 2025

CVE-2025-54804: Russh project russh integer overflow vulnerability

Russh Project · Russh

Russh is a Rust SSH client & server library. In versions 0.54.0 and below, the channel window adjust message of the SSH protocol is used to track the free space in the receive buffer of the other side of a channel. The current implementation takes the value from the message and adds it to an internal state value. This can result in a integer overflow. If the Rust code is compiled with overflow checks, it will panic. A malicious client can crash a server. This is fixed in version 0.54.1.

6.5 CVSS 3.1 Medium EPSS 0.40% · top 69.0% CWE-190 · Integer overflow
6.5CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
3References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Russh is a Rust SSH client & server library. In versions 0.54.0 and below, the channel window adjust message of the SSH protocol is used to track the free space in the receive buffer of the other side of a channel. The current implementation takes the value from the message and adds it to an internal state value. This can result in a integer overflow. If the Rust code is compiled with overflow checks, it will panic. A malicious client can crash a server. This is fixed in version 0.54.1.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/Eugeny/russh/commit/0eb5e406780890e21ff71dd25d731b30676478e5 Patch
https://github.com/Eugeny/russh/security/advisories/GHSA-h5rc-j5f5-3gcm ExploitVendor Advisory
https://github.com/Eugeny/russh/security/advisories/GHSA-h5rc-j5f5-3gcm ExploitVendor Advisory

Track CVE-2025-54804 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-48712Warpgate project warpgate incorrect authorization vulnerabilityWarpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. In affected versions there is a privilege escalation vulnerability through a …EPSS 0.68%8.8CVE-2023-37268Warpgate project warpgate improper authentication vulnerabilityWarpgate is an SSH, HTTPS and MySQL bastion host for Linux that doesn't need special client apps. When logging in as a user with SSO enabled an attac…EPSS 0.55%8.1CVE-2023-43660Warpgate project warpgate improper authentication vulnerabilityWarpgate is a smart SSH, HTTPS and MySQL bastion host for Linux that doesn't need special client apps. The SSH key verification for a user can be byp…EPSS 0.25%7.5CVE-2026-42189Russh project russh allocation without limits vulnerabilityRussh is a Rust SSH client & server library. Prior to version 0.60.1, a pre-authentication denial-of-service vulnerability exists in the server's key…EPSS 0.76%7.5CVE-2024-43410Russh project russh allocation without limits vulnerabilityRussh is a Rust SSH client & server library. Allocating an untrusted amount of memory allows any unauthenticated user to OOM a russh server. An SSH p…EPSS 0.91%6.5CVE-2026-44347Warpgate project warpgate cross-site request forgery vulnerabilityWarpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. Prior to 0.23.3, the SSO flow does not validate the state parameter, which ma…EPSS 0.16%5.9CVE-2023-48795SSH Terrapin attack downgrades channel integrity in OpenSSH and many SSH implementationsThe SSH transport protocol with certain OpenSSH extensions mishandles the handshake and sequence numbers, letting a remote attacker omit packets from…EPSS 93%analysed5.9CVE-2023-28113Russh project russh improper input validation vulnerabilityrussh is a Rust SSH client and server library. Starting in version 0.34.0 and prior to versions 0.36.2 and 0.37.1, Diffie-Hellman key validation is i…EPSS 0.64%

Source: NIST National Vulnerability Database (record CVE-2025-54804), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.