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.
References (2)
Core 2
Core References
Exploit, Vendor Advisory x_refsource_confirm
https://github.com/Eugeny/russh/security/advisories/GHSA-h5rc-j5f5-3gcm
Patch x_refsource_misc
https://github.com/Eugeny/russh/commit/0eb5e406780890e21ff71dd25d731b30676478e5
Scores
CVSS v3
6.5
EPSS
0.0012
EPSS Percentile
30.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-190
Status
published
Products (3)
crates.io/russh
0 - 0.54.1crates.io
russh_project/russh
< 0.54.1
warpgate_project/warpgate
< 0.16.0
Published
Aug 05, 2025
Tracked Since
Feb 18, 2026