diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 314a7133ba..20ee46741d 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -1455,6 +1455,10 @@ The following platforms are not supported but have been tested for this release.
 
 Known Problems
 ==============
+    Setting a variable-length dataset fill value will leak the memory allocated
+    for the p field of the hvl_t struct. A fix is in progress for this.
+    HDFFV-10840
+
     CMake files do not behave correctly with paths containing spaces.
     Do not use spaces in paths because the required escaping for handling spaces
     results in very complex and fragile build files.