diff --git a/CHANGES b/CHANGES
index 095d027bb5..5a59e438b9 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+6322.	[security]	Specific DNS answers could cause a denial-of-service
+			condition due to DNS validation taking a long time.
+			(CVE-2023-50387) [GL #4424]
+
 6321.	[security]	Change 6315 inadvertently introduced regressions that
 			could cause named to crash. [GL #4234]
 
diff --git a/doc/notes/notes-current.rst b/doc/notes/notes-current.rst
new file mode 100644
index 0000000000..0a84c2cadc
--- /dev/null
+++ b/doc/notes/notes-current.rst
@@ -0,0 +1,31 @@
+.. Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+..
+.. SPDX-License-Identifier: MPL-2.0
+..
+.. This Source Code Form is subject to the terms of the Mozilla Public
+.. License, v. 2.0.  If a copy of the MPL was not distributed with this
+.. file, you can obtain one at https://mozilla.org/MPL/2.0/.
+..
+.. See the COPYRIGHT file distributed with this work for additional
+.. information regarding copyright ownership.
+
+Notes for BIND 9.19.21
+----------------------
+
+Security Fixes
+~~~~~~~~~~~~~~
+
+- Validating DNS messages containing a lot of DNSSEC signatures could
+  cause excessive CPU load, leading to a denial-of-service condition.
+  This has been fixed. :cve:`2023-50387`
+
+  ISC would like to thank Elias Heftrig, Haya Schulmann, Niklas Vogel,
+  and Michael Waidner from the German National Research Center for
+  Applied Cybersecurity ATHENE. :gl:`#4424`
+
+Known Issues
+~~~~~~~~~~~~
+
+- There are no new known issues with this release. See :ref:`above
+  <relnotes_known_issues>` for a list of all known issues affecting this
+  BIND 9 branch.