Denial of Service Vulnerability in SSH Servers from Go
CVE-2025-22869

7.5HIGH

Key Information:

Vendor
Golang.org/x/crypto
Status
Golang.org/x/crypto/ssh
Vendor
CVE Published:
26 February 2025

Summary

SSH servers that implement file transfer protocols are prone to a denial of service attack. This occurs when clients complete the key exchange process slowly or do not complete it at all. As a result, data intended for transmission can accumulate in memory without being sent, leading to potential service disruptions.

Affected Version(s)

golang.org/x/crypto/ssh 0 < 0.35.0

References

https://go.dev/cl/652135
https://go.dev/issue/71931
https://pkg.go.dev/vuln/GO-2025-3487

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yuichi Watanabe
.
CVE-2025-22869 : Denial of Service Vulnerability in SSH Servers from Go | SecurityVulnerability.io