From 4c368732ebb2eb6f6b25c87a7870914cf58c4ea7 Mon Sep 17 00:00:00 2001
From: "valery.bokov" <vlry.bkv@gmail.com>
Date: Tue, 2 Jun 2026 18:32:59 +0200
Subject: [PATCH] release resources in CCITTFaxEncoderStream

---
 .../java/org/apache/pdfbox/filter/CCITTFaxEncoderStream.java  | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pdfbox/src/main/java/org/apache/pdfbox/filter/CCITTFaxEncoderStream.java b/pdfbox/src/main/java/org/apache/pdfbox/filter/CCITTFaxEncoderStream.java
index 16e25b0e60b..4b8e30e0291 100644
--- a/pdfbox/src/main/java/org/apache/pdfbox/filter/CCITTFaxEncoderStream.java
+++ b/pdfbox/src/main/java/org/apache/pdfbox/filter/CCITTFaxEncoderStream.java
@@ -93,6 +93,10 @@ public void flush() throws IOException {
 
     @Override
     public void close() throws IOException {
+        // Release large data structures immediately so the GC can reclaim memory
+        // even if callers hold a reference to this COSDocument instance.
+        changesCurrentRow = null;
+        changesReferenceRow = null;
         stream.close();
     }