Add Release Note for [GL #2950]

diff --git a/doc/notes/notes-current.rst b/doc/notes/notes-current.rst
index d4649724e2e14306d43856f5940916727ab78f45..3b0f2602fa7205a76e7674f893bfb02eb09bad39 100644 (file)
--- a/doc/notes/notes-current.rst
+++ b/doc/notes/notes-current.rst
@@ -15,7 +15,14 @@ Notes for BIND 9.16.27
 Security Fixes
 ~~~~~~~~~~~~~~
 
-- None.
+- The rules for acceptance of records into the cache have been tightened
+  to prevent the possibility of poisoning if forwarders send records
+  outside the configured bailiwick. (CVE-2021-25220)
+
+  ISC would like to thank Xiang Li, Baojun Liu, and Chaoyi Lu from
+  Network and Information Security Lab, Tsinghua University, and
+  Changgen Zou from Qi An Xin Group Corp. for bringing this
+  vulnerability to our attention. :gl:`#2950`
 
 Known Issues
 ~~~~~~~~~~~~