CVE-2025-54804
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductRussh
PublishedAug 5, 2025
First seenAug 5, 2025
Weakness typeCWE-190Integer overflow
How to fix
Update
- russh_project russh0.54.1 or later
- warpgate_project warpgate0.16.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| russh_project russh | v < 0.54.1 | 0.54.1 |
| warpgate_project warpgate | v < 0.16.0 | 0.16.0 |
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