What is the CVSS score of CVE-2025-54804?

CVE-2025-54804 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Russh are affected by CVE-2025-54804?

Organizations using Russh should be aware of notable risk from CVE-2025-54804, a integer overflow vulnerability rated CVSS 6.5. Exploitation could cause memory corruption or application crashes.. A patch is available.

Is there a public PoC exploit available for CVE-2025-54804?

Yes, a public proof-of-concept exploit is available for CVE-2025-54804. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-54804?

Within 7 days: Identify affected systems and apply vendor patches promptly. Vendor patch is available.

Russh CVE-2025-54804

MEDIUM

Integer Overflow or Wraparound (CWE-190)

2025-08-05 security-advisories@github.com

Denial Of Service Integer Overflow Russh Warpgate Red Hat

6.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.5 MEDIUM

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

Red Hat

6.5 MEDIUM

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:05 vuln.today

Patch released

Mar 28, 2026 - 19:05 nvd

Patch available

PoC Detected

Aug 13, 2025 - 18:32 vuln.today

Public exploit code

CVE Published

Aug 05, 2025 - 01:15 nvd

MEDIUM 6.5

DescriptionGitHub Advisory

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.

AnalysisAI

Russh is a Rust SSH client & server library. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Integer Overflow (CWE-190), which allows attackers to cause unexpected behavior through arithmetic overflow. 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. Affected products include: Russh Project Russh, Warpgate Project Warpgate. Version information: version 0.54.1..

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate arithmetic operations, use safe integer libraries, check bounds before allocation.