diff --git a/backport-CVE-2022-3970.patch b/backport-CVE-2022-3970.patch
new file mode 100644
index 0000000..b83a539
--- /dev/null
+++ b/backport-CVE-2022-3970.patch
@@ -0,0 +1,37 @@
+From 227500897dfb07fb7d27f7aa570050e62617e3be Mon Sep 17 00:00:00 2001
+From: Even Rouault <even.rouault@spatialys.com>
+Date: Tue, 8 Nov 2022 15:16:58 +0100
+Subject: [PATCH] TIFFReadRGBATileExt(): fix (unsigned) integer overflow on
+ strips/tiles > 2 GB
+
+Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=53137
+---
+ libtiff/tif_getimage.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/libtiff/tif_getimage.c b/libtiff/tif_getimage.c
+index a4d0c1d6..60b94d8e 100644
+--- a/libtiff/tif_getimage.c
++++ b/libtiff/tif_getimage.c
+@@ -3016,15 +3016,15 @@ TIFFReadRGBATileExt(TIFF* tif, uint32_t col, uint32_t row, uint32_t * raster, in
+         return( ok );
+ 
+     for( i_row = 0; i_row < read_ysize; i_row++ ) {
+-        memmove( raster + (tile_ysize - i_row - 1) * tile_xsize,
+-                 raster + (read_ysize - i_row - 1) * read_xsize,
++        memmove( raster + (size_t)(tile_ysize - i_row - 1) * tile_xsize,
++                 raster + (size_t)(read_ysize - i_row - 1) * read_xsize,
+                  read_xsize * sizeof(uint32_t) );
+-        _TIFFmemset( raster + (tile_ysize - i_row - 1) * tile_xsize+read_xsize,
++        _TIFFmemset( raster + (size_t)(tile_ysize - i_row - 1) * tile_xsize+read_xsize,
+                      0, sizeof(uint32_t) * (tile_xsize - read_xsize) );
+     }
+ 
+     for( i_row = read_ysize; i_row < tile_ysize; i_row++ ) {
+-        _TIFFmemset( raster + (tile_ysize - i_row - 1) * tile_xsize,
++        _TIFFmemset( raster + (size_t)(tile_ysize - i_row - 1) * tile_xsize,
+                      0, sizeof(uint32_t) * tile_xsize );
+     }
+ 
+-- 
+GitLab
\ No newline at end of file
diff --git a/libtiff.spec b/libtiff.spec
index 7e804da..f36b387 100644
--- a/libtiff.spec
+++ b/libtiff.spec
@@ -1,6 +1,6 @@
 Name:           libtiff
 Version:        4.3.0
-Release:        20
+Release:        21
 Summary:        TIFF Library and Utilities
 License:        libtiff
 URL:            https://www.simplesystems.org/libtiff/
@@ -33,6 +33,8 @@ Patch6023:      backport-CVE-2022-3599.patch
 
 Patch9000:	fix-raw2tiff-floating-point-exception.patch
 
+Patch6024:      backport-CVE-2022-3970.patch
+
 BuildRequires:  gcc gcc-c++ zlib-devel libjpeg-devel jbigkit-devel
 BuildRequires:  libtool automake autoconf pkgconfig 
 
@@ -152,6 +154,12 @@ find html -name 'Makefile*' | xargs rm
 %exclude %{_datadir}/html/man/tiffgt.1.html
 
 %changelog
+* Thu Nov 17 2022 qisen <qisen@huawei.com> - 4.3.0-21
+- Type:cve
+- ID:CVE-2022-3970
+- SUG:NA
+- DESC:fix CVE-2022-3970
+
 * Wed Oct 26 2022 zhouwenpei <zhouwenpei1@h-partners.com> - 4.3.0-20
 - fix CVE-2022-3570,CVE-2022-3597,CVE-2022-3598,CVE-2022-3599,CVE-2022-3626,CVE-2022-3627