CVE-2026-78662
N/A
N/A
Summary
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
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh | 0 < 0.56.0 | affected |
Weaknesses
- CWE-770: Allocation of Resources Without Limits or Throttling
References
- https://go.dev/issue/81316
- https://go.dev/cl/826504
- https://groups.google.com/g/golang-announce/c/1y3fb2np35U
- https://pkg.go.dev/vuln/GO-2026-6354
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