CVE-2025-54804
Russh is missing an overflow check during channel windows adjust
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 6.5EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
05 Aug 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
Eugeny · russhWant to know if your infrastructure is exposed to this?
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