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CVE-2025-54804— Russh is missing an overflow check during channel windows adjust

Quick assessment

Affected
Eugeny russh
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Russh是Eugene个人开发者的一个 Rust SSH 客户端和服务器端库。 Russh 0.54.0及之前版本存在安全漏洞，该漏洞源于SSH协议通道窗口调整消息处理不当，可能导致整数溢出。

CVSS 6.5 · Medium EPSS 0.40% · P31

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-54804

Vulnerability Information
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Vulnerability Title
Russh is missing an overflow check during channel windows adjust
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Russh 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Russh是Eugene个人开发者的一个 Rust SSH 客户端和服务器端库。 Russh 0.54.0及之前版本存在安全漏洞，该漏洞源于SSH协议通道窗口调整消息处理不当，可能导致整数溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eugeny russh < 0.54.1 -

II. Public POCs for CVE-2025-54804

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III. Intelligence Information for CVE-2025-54804

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IV. Related Vulnerabilities

Same product: russh
Same vendor: Eugeny
Same weakness: CWE-190

V. Comments for CVE-2025-54804

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