diff --git a/django/db/models/expressions.py b/django/db/models/expressions.py
index 54e372ea01..dc070114c9 100644
--- a/django/db/models/expressions.py
+++ b/django/db/models/expressions.py
@@ -297,7 +297,7 @@ class BaseExpression:
         c.is_summary = summarize
         source_expressions = [
             (
-                expr.resolve_expression(query, allow_joins, reuse, summarize)
+                expr.resolve_expression(query, allow_joins, reuse, summarize, for_save)
                 if expr is not None
                 else None
             )
diff --git a/docs/releases/5.2.3.txt b/docs/releases/5.2.3.txt
index 5aaa7fd2dd..927ec16d34 100644
--- a/docs/releases/5.2.3.txt
+++ b/docs/releases/5.2.3.txt
@@ -13,3 +13,7 @@ Bugfixes
 * Fixed a log injection possibility by migrating remaining response logging
   to ``django.utils.log.log_response()``, which safely escapes arguments such
   as the request path to prevent unsafe log output (:cve:`2025-48432`).
+
+* Fixed a regression in Django 5.2 that caused :meth:`.QuerySet.bulk_update` to
+  incorrectly convert ``None`` to JSON ``null`` instead of SQL ``NULL`` for
+  ``JSONField`` (:ticket:`36419`).
diff --git a/tests/queries/test_bulk_update.py b/tests/queries/test_bulk_update.py
index 765fa934ca..480fac6784 100644
--- a/tests/queries/test_bulk_update.py
+++ b/tests/queries/test_bulk_update.py
@@ -4,7 +4,7 @@ from math import ceil
 from django.core.exceptions import FieldDoesNotExist
 from django.db import connection
 from django.db.models import F
-from django.db.models.functions import Lower
+from django.db.models.functions import Coalesce, Lower
 from django.db.utils import IntegrityError
 from django.test import TestCase, override_settings, skipUnlessDBFeature
 
@@ -300,6 +300,21 @@ class BulkUpdateTests(TestCase):
             JSONFieldNullable.objects.filter(json_field__has_key="c"), objs
         )
 
+    @skipUnlessDBFeature("supports_json_field")
+    def test_json_field_sql_null(self):
+        obj = JSONFieldNullable.objects.create(json_field={})
+        test_cases = [
+            ("direct_none_assignment", None),
+            ("expression_none_assignment", Coalesce(None, None)),
+        ]
+        for label, value in test_cases:
+            with self.subTest(case=label):
+                obj.json_field = value
+                JSONFieldNullable.objects.bulk_update([obj], fields=["json_field"])
+                obj.refresh_from_db()
+                sql_null_qs = JSONFieldNullable.objects.filter(json_field__isnull=True)
+                self.assertSequenceEqual(sql_null_qs, [obj])
+
     def test_nullable_fk_after_related_save(self):
         parent = RelatedObject.objects.create()
         child = SingleObject()