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CVE-2026-56855

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

Description (CNA)

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 (CNA)

Vendor / productVersions
golang.org/x/crypto / golang.org/x/crypto/sshaffected 0 before 0.56.0

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.