CVE-2025-54804

MEDIUM EPSS 28.8%
Published Aug 5, 202511mo ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
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Published Aug 5, 2025 11mo ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
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

Threat Intelligence

EPSS Exploit Probability
28.8% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

Affected Products 2

VendorProductVersionRange
russh_projectrussh* <0.54.1
warpgate_projectwarpgate* <0.16.0

References 2

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

Remediation

  • github.com https://github.com/Eugeny/russh/commit/0eb5e406780890e21ff71dd25d731b30676478e5
    Patch