Commit fdbe649c3 for imagemagick.org

commit fdbe649c3d305d266ebe3935ba8e0416cce0c9af
Author: Cristy <urban-warrior@imagemagick.org>
Date:   Sat Jun 27 11:59:34 2026 -0400

    https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-cvxf-g9w2-7mcx

diff --git a/coders/cals.c b/coders/cals.c
index d99559c0e..544d1a195 100644
--- a/coders/cals.c
+++ b/coders/cals.c
@@ -261,8 +261,6 @@ static Image *ReadCALSImage(const ImageInfo *image_info,
   while ((c=ReadBlobByte(image)) != EOF)
     if (fputc(c,file) != c)
       break;
-  if (fflush(file) != 0)
-    ThrowImageException(FileOpenError,"UnableToCreateTemporaryFile");
   if (fseek(file,0,SEEK_SET) != 0)
     ThrowImageException(FileOpenError,"UnableToCreateTemporaryFile");
   (void) CloseBlob(image);
diff --git a/coders/dcm.c b/coders/dcm.c
index ec6855795..8f68f7e97 100644
--- a/coders/dcm.c
+++ b/coders/dcm.c
@@ -3989,7 +3989,7 @@ static Image *ReadDCMImage(const ImageInfo *image_info,ExceptionInfo *exception)
           file=(FILE *) NULL;
           unique_file=AcquireUniqueFileResource(filename);
           if (unique_file != -1)
-            file=fdopen(unique_file,"wb");
+            file=fdopen(unique_file,"rb+");
           if (file == (FILE *) NULL)
             {
               (void) RelinquishUniqueFileResource(filename);
@@ -4009,15 +4009,18 @@ static Image *ReadDCMImage(const ImageInfo *image_info,ExceptionInfo *exception)
             if (fputc(c,file) != c)
               break;
           }
-          (void) fclose(file);
           if (c == EOF)
             break;
+          if (fseek(file,0,SEEK_SET) != 0)
+            ThrowDCMException(FileOpenError,"UnableToCreateTemporaryFile");
           (void) FormatLocaleString(read_info->filename,MagickPathExtent,
             "jpeg:%s",filename);
           if (image->compression == JPEG2000Compression)
             (void) FormatLocaleString(read_info->filename,MagickPathExtent,
               "j2k:%s",filename);
+          read_info->file=file;
           jpeg_image=ReadImage(read_info,exception);
+          read_info->file=(FILE *) NULL;
           if (jpeg_image != (Image *) NULL)
             {
               ResetImagePropertyIterator(image);