mondrake
--- a/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
    return [IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_GIF, IMAGETYPE_WEBP];
  }

+  /**
+   * Checks that there is enough memory available for a GD operation.
--- a/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php
    $this->assertTrue($image->isValid(), 'CreateNew with valid arguments validates the Image.');
  }

+  /**
+   * Tests creation of an image that will exceed the memory limit.
+   */
+  public function testInsufficientMemory(): void {
+    $image = $this->imageFactory->get('core/tests/fixtures/files/image-test.png');
+
+    $oldGdImage = $image->getToolkit()->getResource();
+    $this->assertFalse($image->createNew(200000, 200000));