1 files changed, 34 insertions, 0 deletions

diff --git a/meta/recipes-support/vim/files/CVE-2021-3928.patch b/meta/recipes-support/vim/files/CVE-2021-3928.patch
new file mode 100644
index 0000000000..8672367ab9
--- /dev/null
+++ b/meta/recipes-support/vim/files/CVE-2021-3928.patch
@@ -0,0 +1,34 @@
+From ad7f7a3f81077ddfac451acd33ca049b9f2a5178 Mon Sep 17 00:00:00 2001
+From: Bram Moolenaar <Bram@vim.org>
+Date: Wed, 17 Nov 2021 11:22:21 +0800
+Subject: [PATCH] patch 8.2.3582: reading uninitialized memory when giving
+ spell suggestions
+
+Problem:    Reading uninitialized memory when giving spell suggestions.
+Solution:   Check that preword is not empty.
+
+CVE: CVE-2021-3928
+
+Upstream-Status: Backport [https://github.com/vim/vim/commit/15d9890eee53afc61eb0a03b878a19cb5672f732]
+
+Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
+---
+ src/spellsuggest.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/spellsuggest.c b/src/spellsuggest.c
+index 9d6df7930..88307b203 100644
+--- a/src/spellsuggest.c
++++ b/src/spellsuggest.c
+@@ -1600,7 +1600,7 @@ suggest_trie_walk(
+                    // char, e.g., "thes," -> "these".
+                    p = fword + sp->ts_fidx;
+                    MB_PTR_BACK(fword, p);
+-                   if (!spell_iswordp(p, curwin))
++                   if (!spell_iswordp(p, curwin) && *preword != NUL)
+                    {
+                        p = preword + STRLEN(preword);
+                        MB_PTR_BACK(preword, p);
+-- 
+2.17.1
+