What is CVE-2025-54804?

CVE-2025-54804 is a medium-severity vulnerability in Eugeny Russh, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2025-08-05.

How severe is CVE-2025-54804?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2025-54804 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Integer overflow in Eugeny Russh

CVE-2025-54804

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 implementati…

Vulnerability class: Integer Overflow

EPSS: 0.004 (58.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Eugeny Russh — versions < 0.54.1

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

https://github.com/Eugeny/russh/security/advisories/GHSA-h5rc-j5f5-3gcm (x_refsource_CONFIRM)
https://github.com/Eugeny/russh/commit/0eb5e406780890e21ff71dd25d731b30676478e5 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-54804?: CVE-2025-54804 is a medium-severity vulnerability in Eugeny Russh, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2025-08-05.
How severe is CVE-2025-54804?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-54804 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.