diff --git a/backport-CVE-2021-3984.patch b/backport-CVE-2021-3984.patch
new file mode 100644
index 0000000000000000000000000000000000000000..cf8fd05237085a77f8a077f8d826bf5da7e90a3a
--- /dev/null
+++ b/backport-CVE-2021-3984.patch
@@ -0,0 +1,64 @@
+From 2de9b7c7c8791da8853a9a7ca9c467867465b655 Mon Sep 17 00:00:00 2001
+From: Bram Moolenaar <Bram@vim.org>
+Date: Fri, 19 Nov 2021 19:41:13 +0000
+Subject: [PATCH] patch 8.2.3625: illegal memory access when C-indenting
+
+Problem:    Illegal memory access when C-indenting.
+Solution:   Also set the cursor column.
+---
+ src/cindent.c                | 10 +++++-----
+ src/testdir/test_cindent.vim | 12 ++++++++++++
+ 2 files changed, 17 insertions(+), 5 deletions(-)
+
+diff --git a/src/cindent.c b/src/cindent.c
+index c7caed6..28d1558 100644
+--- a/src/cindent.c
++++ b/src/cindent.c
+@@ -1635,10 +1635,10 @@ get_baseclass_amount(int col)
+     static pos_T *
+ find_start_brace(void)	    // XXX
+ {
+-    pos_T	cursor_save;
+-    pos_T	*trypos;
+-    pos_T	*pos;
+-    static pos_T	pos_copy;
++    pos_T	    cursor_save;
++    pos_T	    *trypos;
++    pos_T	    *pos;
++    static pos_T    pos_copy;
+ 
+     cursor_save = curwin->w_cursor;
+     while ((trypos = findmatchlimit(NULL, '{', FM_BLOCKSTOP, 0)) != NULL)
+@@ -1652,7 +1652,7 @@ find_start_brace(void)	    // XXX
+ 		       && (pos = ind_find_start_CORS(NULL)) == NULL) // XXX
+ 	    break;
+ 	if (pos != NULL)
+-	    curwin->w_cursor.lnum = pos->lnum;
++	    curwin->w_cursor = *pos;
+     }
+     curwin->w_cursor = cursor_save;
+     return trypos;
+diff --git a/src/testdir/test_cindent.vim b/src/testdir/test_cindent.vim
+index 2cb3f24..2a87460 100644
+--- a/src/testdir/test_cindent.vim
++++ b/src/testdir/test_cindent.vim
+@@ -5251,4 +5251,16 @@ func Test_cindent_56()
+   enew! | close
+ endfunc
+ 
++func Test_find_brace_backwards()
++  " this was looking beyond the end of the line
++  new
++  norm R/*
++  norm o0{
++  norm o//
++  norm V{=
++  call assert_equal(['/*', '   0{', '//'], getline(1, 3))
++  bwipe!
++endfunc
++
++
+ " vim: shiftwidth=2 sts=2 expandtab
+-- 
+1.8.3.1
+
diff --git a/vim.spec b/vim.spec
index ab1fbe382b84ab05f576423a78c8487fd90ee2e9..963bd979ef15b6395fc2fd781a99112411b02d5c 100644
--- a/vim.spec
+++ b/vim.spec
@@ -12,7 +12,7 @@
 Name:           vim
 Epoch:          2
 Version:        8.2
-Release:        15
+Release:        16
 Summary:        Vim is a highly configurable text editor for efficiently creating and changing any kind of text.
 License:        Vim and MIT
 URL:            http://www.vim.org
@@ -49,6 +49,7 @@ Patch6011:      backport-CVE-2021-3973.patch
 Patch6012:      backport-CVE-2021-3974.patch
 Patch6013:      backport-find-test-fails.patch
 Patch6014:      backport-no-early-check-if-find-and-sfind-have-an-argument.patch
+Patch6015:      backport-CVE-2021-3984.patch
 
 Patch9000:      bugfix-rm-modify-info-version.patch
 
@@ -437,6 +438,12 @@ popd
 %{_mandir}/man1/evim.*
 
 %changelog
+* Sat Dec 04 2021 shixuantong<shixuantong@huawei.com> - 2:8.2-16
+- Type:CVE
+- ID:CVE-2021-3984
+- SUG:NA
+- DESC:fix CVE-2021-3984
+
 * Wed Dec 01 2021 ExtinctFire<shenyining_00@126.com> - 2:8.2-15
 - Type:CVE
 - ID:CVE-2021-3973 CVE-2021-3974