Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.

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History

Thu, 03 Sep 2026 16:00:00 +0000

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

Thu, 03 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 03 Sep 2026 10:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
CWE-417

Wed, 02 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
Description Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.
Title Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-09-03T13:20:12.263Z

Reserved: 2026-08-24T23:36:15.738Z

Link: CVE-2026-78662

cve-icon Vulnrichment

Updated: 2026-09-03T13:20:04.912Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-02T20:17:37.167

Modified: 2026-09-03T16:37:52.170

Link: CVE-2026-78662

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-03T15:45:05Z

Weaknesses