CVE-2026-56855
N/A
N/A
Summary
Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connection down instead of buffering and blocking.
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/81317
- https://go.dev/cl/826524
- https://groups.google.com/g/golang-announce/c/1y3fb2np35U
- https://pkg.go.dev/vuln/GO-2026-6355
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