Commit 3a12d6336 for imagemagick.org

commit 3a12d63368e88350ed838966fcbb67625938cf3a
Author: Cristy <urban-warrior@imagemagick.org>
Date:   Mon May 18 21:52:07 2026 -0400

    https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-5v62-8fq6-cp9m

diff --git a/MagickCore/compare.c b/MagickCore/compare.c
index 8cb2996ae..2973d7df3 100644
--- a/MagickCore/compare.c
+++ b/MagickCore/compare.c
@@ -4766,8 +4766,8 @@ MagickExport Image *SimilarityImage(const Image *image,const Image *reconstruct,
         "GeometryDoesNotContainImage","`%s'",image->filename);
       return((Image *) NULL);
     }
-  similarity_image=CloneImage(image,image->columns,image->rows,MagickTrue,
-    exception);
+  similarity_image=CloneImage(image,image->columns-reconstruct->columns+1,
+    image->rows-reconstruct->rows+1,MagickTrue,exception);
   if (similarity_image == (Image *) NULL)
     return((Image *) NULL);
   similarity_image->depth=32;