GO-2026-6355
Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh
At a glance
- Published
- Updated
- CVE
- CVE-2026-56855
Description
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 packages
| Package | Versions |
|---|---|
| Go · golang.org/x/crypto | introduced 0, fixed 0.56.0 |
References
- https://go.dev/issue/81317 REPORT
- https://go.dev/cl/826524 FIX
- https://groups.google.com/g/golang-announce/c/1y3fb2np35U WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |