diff --git a/CVE-2020-21679.patch b/CVE-2020-21679.patch
new file mode 100644
index 0000000000000000000000000000000000000000..e4f360176aa119880bd930ecc5a7c40832b1ead2
--- /dev/null
+++ b/CVE-2020-21679.patch
@@ -0,0 +1,57 @@
+# HG changeset patch
+# User Bob Friesenhahn <bfriesen@GraphicsMagick.org>
+# Date 1577551727 21600
+# Node ID bd13b1d335f3d5e00f3089867475c47ac646292b
+# Parent  0d2c92bd86279a83424132dc732b75344b11327d
+WritePCXImage(): Fix heap overflow when bytes per line is too large.
+
+Origin: http://hg.graphicsmagick.org/hg/GraphicsMagick/rev/bd13b1d335f3
+
+diff -r 0d2c92bd8627 -r bd13b1d335f3 coders/pcx.c
+--- a/coders/pcx.c	Sat Dec 28 10:19:36 2019 -0600
++++ b/coders/pcx.c	Sat Dec 28 10:48:47 2019 -0600
+@@ -1,5 +1,5 @@
+ /*
+-% Copyright (C) 2003 - 2018 GraphicsMagick Group
++% Copyright (C) 2003 - 2019 GraphicsMagick Group
+ % Copyright (C) 2002 ImageMagick Studio
+ % Copyright 1991-1999 E. I. du Pont de Nemours and Company
+ %
+@@ -1008,7 +1008,7 @@
+     *q;
+ 
+   size_t
+-    length;
++    bytes_per_line;
+ 
+   unsigned char
+     *pcx_colormap = (unsigned char *) NULL,
+@@ -1126,8 +1126,16 @@
+         if (image->matte)
+           pcx_info.planes++;
+       }
+-    pcx_info.bytes_per_line=(unsigned short)
+-      (((unsigned long) image->columns*pcx_info.bits_per_pixel+7)/8);
++
++    /* image->columns*pcx_info.bits_per_pixel+7)/8 */
++    bytes_per_line=MagickArraySize(image->columns,pcx_info.bits_per_pixel);
++    if (bytes_per_line && (~((size_t)0)-7 > bytes_per_line))
++      bytes_per_line += 7;
++    bytes_per_line /= 8;
++    pcx_info.bytes_per_line=(unsigned short) bytes_per_line;
++    if ((pcx_info.bytes_per_line == 0) ||
++        ((size_t) pcx_info.bytes_per_line != bytes_per_line))
++      ThrowPCXWriterException(CoderError,UnsupportedNumberOfColumns,image);
+     pcx_info.palette_info=1;
+     pcx_info.colormap_signature=0x0c;
+     /*
+@@ -1168,8 +1176,7 @@
+     for (i=0; i < 58; i++)
+       (void) WriteBlobByte(image,'\0');
+     /* Allocate memory for one pixel row. */
+-    length=(size_t) pcx_info.bytes_per_line*pcx_info.planes;
+-    pcx_pixels=MagickAllocateMemory(unsigned char *,length);
++    pcx_pixels=MagickAllocateArray(unsigned char *,bytes_per_line,pcx_info.planes);
+     if (pcx_pixels == (unsigned char *) NULL)
+       ThrowPCXWriterException(ResourceLimitError,MemoryAllocationFailed,image);
+     q=pcx_pixels;
diff --git a/GraphicsMagick.spec b/GraphicsMagick.spec
index bd59abc6565217eb1e3603357649f96a31593668..09d2f51e579315365a3ca6ebd1c5a85128a5adde 100644
--- a/GraphicsMagick.spec
+++ b/GraphicsMagick.spec
@@ -10,7 +10,7 @@
 
 Name:          GraphicsMagick
 Version:       1.3.30
-Release:       9
+Release:       10
 Summary:       Derived from ImageMagick, providing faster image generation speed and better quality
 License:       MIT
 Source0:       http://downloads.sourceforge.net/sourceforge/graphicsmagick/GraphicsMagick-%{version}.tar.xz
@@ -33,6 +33,7 @@ Patch0013:     CVE-2020-10938.patch
 Patch0014:     CVE-2020-12672.patch
 Patch0015:     CVE-2019-11473-CVE-2019-11474.patch
 Patch0016:     CVE-2022-1270.patch
+Patch0017:     CVE-2020-21679.patch
 
 BuildRequires: bzip2-devel freetype-devel gcc-c++ giflib-devel lcms2-devel libjpeg-devel
 BuildRequires: libpng-devel librsvg2-devel libtiff-devel libtool-ltdl-devel libxml2-devel lpr
@@ -231,6 +232,9 @@ time %make_build check ||:
 
 
 %changelog
+* Wed Sep 13 2023 wangkai <13474090681@163.com> - 1.3.30-10
+- Fix CVE-2020-21679
+
 * Mon Jul 11 2022 houyingchao <houyingchao@h-partners.com> - 1.3.30-9
 - Fix CVE-2022-1270