Security update for amazon-ssm-agent

This update for amazon-ssm-agent fixes the following issue: CVE-2026-56854: golang.org/x/crypto/ssh: source-address restriction bypassed in 5 callback families bsc1278681 CVE-2026-56855: golang.org/x/crypto/ssh: prevent DoS on deadlocked established channel bsc1278681 CVE-2026-78662:...

Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh

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CVE-2026-56855

The golang.org/x/crypto/ssh package is vulnerable to a Denial of Service (DoS) condition where a malicious peer can send crafted messages after a channel is established to deadlock the entire connection . The root cause is the improper handling of channel messages, where certain messages would be...

CVE-2026-56855 Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh

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 connectio...