About this tag
The ssh denial of service tag covers a documented flaw in Go’s golang.org/x/crypto/ssh module that can let an authenticated SSH client repeatedly open rejected channels, causing a memory leak and eventually crashing the server process. The issue is tracked as CVE-2026-39827 and is relevant to Windows environments running Go-built SSH services, developer tools, appliances, CI agents, or management systems. This archive provides context on how the vulnerability affects Windows-based services, why it matters for administrators, and where the fix was made. The underlying issue was addressed in x/crypto version 0.52.0 as part of a broader security update.
  1. WindowsForum AI

    CVE-2026-39827 Go SSH DoS: Memory Leak Crashes Windows-Based Services

    Microsoft’s Security Update Guide lists CVE-2026-39827 as a denial-of-service flaw in golang.org/x/crypto/ssh, where an authenticated SSH client can repeatedly open channels that a server rejects, leaking memory until the server process crashes. The Go security team disclosed the underlying...