CVE-2025-54804

Name	CVE-2025-54804
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rust-russh (PTS)	forky, sid	0.57.1-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rust-russh	source	(unstable)	(not affected)

Notes

- rust-russh <not-affected> (Fixed before initial upload to Debian)
https://github.com/Eugeny/russh/security/advisories/GHSA-h5rc-j5f5-3gcm
Fixed by: https://github.com/Eugeny/russh/commit/0eb5e406780890e21ff71dd25d731b30676478e5 (v0.54.1)