An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
History

Fri, 22 May 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 22 May 2026 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Golang
Golang ssh
Vendors & Products Golang
Golang ssh

Fri, 22 May 2026 03:30:00 +0000

Type Values Removed Values Added
Description An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
Title Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published: 2026-05-22T02:31:27.064Z

Updated: 2026-05-22T18:35:40.472Z

Reserved: 2026-04-07T18:13:03.528Z

Link: CVE-2026-39827

cve-icon Vulnrichment

Updated: 2026-05-22T18:35:26.295Z

cve-icon NVD

Status : Received

Published: 2026-05-22T04:16:21.497

Modified: 2026-05-22T04:16:21.497

Link: CVE-2026-39827

cve-icon Redhat

No data.