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build: Update module golang.org/x/crypto to v0.56.0 [SECURITY] (releases/v5.x) - #2357
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This PR contains the following updates:
v0.55.0→v0.56.0Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh
CVE-2026-78662 / GO-2026-6354
More information
Details
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.
Severity
Unknown
References
This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).
Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh
CVE-2026-56855 / GO-2026-6355
More information
Details
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.
Severity
Unknown
References
This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).
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♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.
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This PR has been generated by Mend Renovate.