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-rw-r--r--ext/exif/exif.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/ext/exif/exif.c b/ext/exif/exif.c
index f961f44a46..c0be05922f 100644
--- a/ext/exif/exif.c
+++ b/ext/exif/exif.c
@@ -3165,7 +3165,8 @@ static int exif_process_IFD_in_MAKERNOTE(image_info_type *ImageInfo, char * valu
continue;
if (maker_note->model && (!ImageInfo->model || strcmp(maker_note->model, ImageInfo->model)))
continue;
- if (maker_note->id_string && strncmp(maker_note->id_string, value_ptr, maker_note->id_string_len))
+ if (maker_note->id_string && value_len >= maker_note->id_string_len
+ && strncmp(maker_note->id_string, value_ptr, maker_note->id_string_len))
continue;
break;
}