7.5
High
CVE-2026-78662 Previously, a channel registered in the mux's chanList is not usable until it is established
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 products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| golang.org/x/crypto/ssh 0.56 | earliest → < 0.56.0 | 0.56.0 |
References
- go.dev go.dev
- go.dev go.dev
- groups.google.com groups.google.com
- pkg.go.dev pkg.go.dev
Timeline
- Published
- Last modified
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