diff --git a/docs/reference/release-notes/7.6.asciidoc b/docs/reference/release-notes/7.6.asciidoc
index 5d04dacdb87..e11b1672e10 100644
--- a/docs/reference/release-notes/7.6.asciidoc
+++ b/docs/reference/release-notes/7.6.asciidoc
@@ -74,6 +74,15 @@ coming[7.6.0]
 
 Also see <<breaking-changes-7.6,Breaking changes in 7.6>>.
 
+[[known-issues-7.6.0]]
+[float]
+=== Known issues
+
+* Indices created in 6.x with <<date,`date`>> and <<date_nanos,`date_nanos`>> fields using formats
+that are incompatible with java.time patterns will cause parsing errors, incorrect date calculations or wrong search results.
+https://github.com/elastic/elasticsearch/pull/52555
+This is fixed in {es} 7.7 and later versions.
+
 [[breaking-7.6.0]]
 [float]
 === Breaking changes