Medium severity6.5NVD Advisory· Published Aug 5, 2025· Updated Jun 17, 2026
CVE-2025-54804
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
russhcrates.io | < 0.54.1 | 0.54.1 |
Affected products
4Patches
Vulnerability mechanics
References
4- github.com/Eugeny/russh/commit/0eb5e406780890e21ff71dd25d731b30676478e5nvdPatchWEB
- github.com/Eugeny/russh/security/advisories/GHSA-h5rc-j5f5-3gcmnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-h5rc-j5f5-3gcmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-54804ghsaADVISORY
News mentions
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