CVE Database›Document archive›CVE-2025-22869

CVE-2025-22869

golang.org/x/crypto/ssh: Denial of Service in the Key Exchange of golang.org/x/crypto/ssh

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · February 26, 2025

Updated · November 4, 2026

Description

A flaw was found in the golang.org/x/crypto/ssh package. SSH clients and servers are vulnerable to increased resource consumption, possibly leading to memory exhaustion and a DoS. This can occur during key exchange when the other party is slow to respond during key exchange.

Statement

While this flaw affects both SSH clients and servers implemented with golang.org/x/crypto/ssh, realistically the flaw will only lead to a DoS when transferring large files, greatly reducing the likelihood of exploitation.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

This flaw can be mitigated when using the client only connecting to trusted servers.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 · Allocation of Resources Without Limits or Throttling