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+.. 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 9.18.3
+---------------------
+
+Security Fixes
+~~~~~~~~~~~~~~
+
+- Previously, TLS socket objects could be destroyed prematurely, which
+  triggered assertion failures in :iscman:`named` instances serving
+  DNS-over-HTTPS (DoH) clients. This has been fixed.
+
+  ISC would like to thank Thomas Amgarten from arcade solutions ag for
+  bringing this vulnerability to our attention. (CVE-2022-1183)
+  :gl:`#3216`
+
+Known Issues
+~~~~~~~~~~~~
+
+- According to :rfc:`8310`, Section 8.1, the ``Subject`` field MUST NOT
+  be inspected when verifying a remote certificate while establishing a
+  DNS-over-TLS connection. Only ``subjectAltName`` must be checked
+  instead. Unfortunately, some quite old versions of cryptographic
+  libraries might lack the ability to ignore the ``Subject`` field. This
+  should have minimal production-use consequences, as most of the
+  production-ready certificates issued by certificate authorities will
+  have ``subjectAltName`` set. In such cases, the ``Subject`` field is
+  ignored. Only old platforms are affected by this, e.g. those supplied
+  with OpenSSL versions older than 1.1.1. :gl:`#3163`
+
+- See :ref:`above <relnotes_known_issues>` for a list of all known
+  issues affecting this BIND 9 branch.
+
+New Features
+~~~~~~~~~~~~
+
+- Catalog Zones schema version 2, as described in the
+  "DNS Catalog Zones" IETF draft version 5 document, is now supported by
+  :iscman:`named`. All of the previously supported BIND-specific catalog
+  zone custom properties (:any:`primaries`, :any:`allow-query`, and
+  :any:`allow-transfer`), as well as the new Change of Ownership (``coo``)
+  property, are now implemented. Schema version 1 is still supported,
+  with some additional validation rules applied from schema version 2:
+  for example, the :any:`version` property is mandatory, and a member zone
+  PTR RRset must not contain more than one record. In the event of a
+  validation error, a corresponding error message is logged to help with
+  diagnosing the problem. :gl:`#3221` :gl:`#3222` :gl:`#3223`
+  :gl:`#3224` :gl:`#3225`
+
+- Support DNS Extended Errors (:rfc:`8914`) ``Stale Answer`` and
+  ``Stale NXDOMAIN Answer`` when stale answers are returned from cache.
+  :gl:`#2267`
+
+- Add support for remote TLS certificate verification, both to
+  :iscman:`named` and :iscman:`dig`, making it possible to implement
+  Strict and Mutual TLS authentication, as described in :rfc:`9103`,
+  Section 9.3. :gl:`#3163`
+
+Bug Fixes
+~~~~~~~~~
+
+- Previously, CDS and CDNSKEY DELETE records were removed from the zone
+  when configured with the ``auto-dnssec maintain;`` option. This has
+  been fixed. :gl:`#2931`