diff --git a/ChangeLog.d/tls13-only-server-infinite-loop.txt b/ChangeLog.d/tls13-only-server-infinite-loop.txt
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+Security
+   * Fixed a critical denial of service in TLS 1.3 only server (TLS 1.2 support
+     disabled at build time): a TLS client could put the TLS 1.3 only server in
+     a infinite loop processing a TLS 1.2 ClientHello. The default
+     configuration is not affected. Reported by Matthias Mucha and Thomas
+     Blattmann, SICK AG.