CVE-2026-78662: CWE-770: Allocation of Resources Without Limits or Throttling in golang.org/x/crypto golang.org/x/crypto/ssh
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.
CVE-2026-78662: CWE-770: Allocation of Resources Without Limits or Throttling in golang.org/x/crypto golang.org/x/crypto/ssh
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.
Affected software
pkg:golang/golang.org/x/crypto/sshRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Go
- Date Reserved
- 2026-08-24T23:36:15.738Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a987e89acd9273b49a9f1ad
Added to database: 09/02/2026, 19:52:41 UTC
Last updated: 09/02/2026, 20:37:21 UTC
Views: 5
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