Commit 538ad18f3 for imagemagick.org

commit 538ad18f3a421d1dd9629baa747eebc137c32b67
Author: Cristy <urban-warrior@imagemagick.org>
Date:   Sat Jun 27 12:11:40 2026 -0400

    https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-h22j-f9xw-xjjm

diff --git a/coders/jnx.c b/coders/jnx.c
index b08db289a..a2c173bd3 100644
--- a/coders/jnx.c
+++ b/coders/jnx.c
@@ -284,6 +284,11 @@ static Image *ReadJNXImage(const ImageInfo *image_info,ExceptionInfo *exception)
           images=DestroyImageList(images);
           ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
         }
+      if (tile_length > (UINT_MAX-2))
+        {
+          images=DestroyImageList(images);
+          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
+        }
       blob=(unsigned char *) AcquireQuantumMemory((size_t) tile_length+2,
         sizeof(*blob));
       if (blob == (unsigned char *) NULL)