vim: Security Fix for CVE-2026-57452

Picking patch as per [1], and same patch is mentioned in [2]

References:
[1] https://nvd.nist.gov/vuln/detail/CVE-2026-57452
[2] https://security-tracker.debian.org/tracker/CVE-2026-57452

(From OE-Core rev: 140b752df903df36a10ffeb1f2bca7b2e3bb8a06)

Signed-off-by: Siddharth Doshi <sdoshi@mvista.com>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/vim/files/CVE-2026-57452.patch

@@ -0,0 +1,76 @@
+From c8777cec25dcfae89c42e9aff51af61f71c5745f Mon Sep 17 00:00:00 2001
+From: Christian Brabandt <cb@256bit.org>
+Date: Thu, 18 Jun 2026 18:41:16 +0000
+Subject: [PATCH] patch 9.2.0671: [security]: possible out-of-bounds read with
+ sodium encrypted files
+
+Problem:  [security]: possible out-of-bounds read with sodium encrypted
+          files (cipher-creator)
+Solution: Verify that there is enough space before calling
+          crypto_secretstream_xchacha20poly1305_init_pull()
+
+Github Security Advisory:
+https://github.com/vim/vim/security/advisories/GHSA-c4j9-wr9j-4486
+
+Supported by AI
+
+Signed-off-by: Christian Brabandt <cb@256bit.org>
+
+Upstream-Status: Backport [https://github.com/vim/vim/commit/c8777cec25dcfae89c42e9aff51af61f71c5745f]
+CVE: CVE-2026-57452
+Signed-off-by: Siddharth Doshi <sdoshi@mvista.com>
+---
+ src/crypt.c                |  3 ++-
+ src/testdir/test_crypt.vim | 24 ++++++++++++++++++++++++
+ 2 files changed, 26 insertions(+), 1 deletion(-)
+
+diff --git a/src/crypt.c b/src/crypt.c
+index 55edd6c6de..a11d204e5e 100644
+--- a/src/crypt.c
++++ b/src/crypt.c
+@@ -1257,7 +1257,8 @@ crypt_sodium_buffer_decode(
+ 
+     if (sod_st->count == 0)
+     {
+-	if (crypto_secretstream_xchacha20poly1305_init_pull(&sod_st->state,
++	if (len < crypto_secretstream_xchacha20poly1305_HEADERBYTES ||
++		crypto_secretstream_xchacha20poly1305_init_pull(&sod_st->state,
+ 						       from, sod_st->key) != 0)
+ 	{
+ 	    emsg(_(e_libsodium_decryption_failed_header_incomplete));
+diff --git a/src/testdir/test_crypt.vim b/src/testdir/test_crypt.vim
+index 4a96c30702..151a4dea17 100644
+--- a/src/testdir/test_crypt.vim
++++ b/src/testdir/test_crypt.vim
+@@ -459,4 +459,28 @@ func Test_crypt_set_key_disallow_append_subtract()
+   bwipe!
+ endfunc
+ 
++func Test_crypt_sodium_short_body()
++  CheckFeature sodium
++  " A VimCrypt~04! file with a complete 36-byte header (12 magic + 16 salt +
++  " 8 seed) but a body shorter than one secretstream header (24 bytes) used to
++  " underflow the body length and crash with a wild out-of-bounds read in
++  " crypto_secretstream_xchacha20poly1305_pull().  It must now fail cleanly.
++  " Bytes: "VimCrypt~04!" + 16 salt + 8 seed + 8-byte body = 44 bytes.
++  call writefile(0z56696D43727970747E303421
++        \ + 0zA0A1A2A3A4A5A6A7A8A9AAABACADAEAF
++        \ + 0zB0B1B2B3B4B5B6B7
++        \ + 0z0000000000000000, 'Xtest_sodium_short')
++
++  let v:errmsg = ''
++  try
++  call feedkeys(":split Xtest_sodium_short\<CR>foobar\<CR>", "xt")
++  catch /^Vim\%((\S\+)\)\=:E1198:/
++    " no-op
++  endtry
++
++  bwipe!
++  call delete('Xtest_sodium_short')
++  set key=
++endfunc
++
+ " vim: shiftwidth=2 sts=2 expandtab
+-- 
+2.44.4
+

meta/recipes-support/vim/vim.inc

@@ -44,6 +44,7 @@ SRC_URI = "git://github.com/vim/vim.git;branch=master;protocol=https \
            file://CVE-2026-55693.patch \
            file://CVE-2026-55892.patch \
            file://CVE-2026-55895.patch \
+           file://CVE-2026-57452.patch \
            "
 
 PV .= ".1683"