From: Siddharth Doshi <[email protected]> Picking patch as per [1], and same patch is mentioned in [2]
References: [1] https://nvd.nist.gov/vuln/detail/CVE-2026-55693 [2] https://security-tracker.debian.org/tracker/CVE-2026-55693 Signed-off-by: Siddharth Doshi <[email protected]> --- .../vim/files/CVE-2026-55693.patch | 88 +++++++++++++++++++ meta/recipes-support/vim/vim.inc | 1 + 2 files changed, 89 insertions(+) create mode 100644 meta/recipes-support/vim/files/CVE-2026-55693.patch diff --git a/meta/recipes-support/vim/files/CVE-2026-55693.patch b/meta/recipes-support/vim/files/CVE-2026-55693.patch new file mode 100644 index 0000000000..d35b6f5fe5 --- /dev/null +++ b/meta/recipes-support/vim/files/CVE-2026-55693.patch @@ -0,0 +1,88 @@ +From 315b35adb406138c962bcc653db95acc3c87c8ab Mon Sep 17 00:00:00 2001 +From: Christian Brabandt <[email protected]> +Date: Mon, 15 Jun 2026 19:39:08 +0000 +Subject: [PATCH 09/17] patch 9.2.0653: [security]: out-of-bounds write in + tree_count_words() + +Problem: [security]: a crafted spell file can drive tree_count_words() + past the end of its MAXWLEN-sized depth arrays; the descent + loop has no depth bound. +Solution: only descend while depth < MAXWLEN - 1, as the sibling trie + walkers already do; apply the same guard to sug_filltree(). + +Github Security Advisory: +https://github.com/vim/vim/security/advisories/GHSA-wgh4-64f7-q3jq + +Supported by AI. + +Signed-off-by: Christian Brabandt <[email protected]> + +Upstream-Status: Backport [https://github.com/vim/vim/commit/a80874d9b84a01040e3d1aef2d4a59e1934dafb7] +CVE: CVE-2026-55693 +Signed-off-by: Siddharth Doshi <[email protected]> +--- + src/spellfile.c | 4 ++-- + src/testdir/test_spellfile.vim | 27 +++++++++++++++++++++++++++ + 2 files changed, 29 insertions(+), 2 deletions(-) + +diff --git a/src/spellfile.c b/src/spellfile.c +index 0b9536dc16..0010d9aa27 100644 +--- a/src/spellfile.c ++++ b/src/spellfile.c +@@ -645,7 +645,7 @@ tree_count_words(char_u *byts, idx_T *idxs) + ++curi[depth]; + } + } +- else ++ else if (depth < MAXWLEN - 1) + { + // Normal char, go one level deeper to count the words. + ++depth; +@@ -5648,7 +5648,7 @@ sug_filltree(spellinfo_T *spin, slang_T *slang) + ++curi[depth]; + } + } +- else ++ else if (depth < MAXWLEN - 1) + { + // Normal char, go one level deeper. + tword[depth++] = c; +diff --git a/src/testdir/test_spellfile.vim b/src/testdir/test_spellfile.vim +index b72974ed07..e5f8c5778f 100644 +--- a/src/testdir/test_spellfile.vim ++++ b/src/testdir/test_spellfile.vim +@@ -1166,4 +1166,31 @@ func Test_mkspell_empty_dic() + endfunc + + ++func Test_spell_sug_tree_count_words_overflow() ++ " A crafted .spl/.sug pair with a BY_INDEX self-cycle in the fold word tree ++ " parses cleanly (shared refs aren't recursed, so read_tree_node()'s depth ++ " cap never trips), but drove tree_count_words() past its MAXWLEN-sized depth ++ " arrays -> stack out-of-bounds write. The walk only happens when ++ " spellsuggest() loads the matching .sug. Reaching the assert == no OOB. ++ call mkdir('Xrtp/spell', 'pR') ++ " VIMspell + v50, SN_SUGFILE(ts), SN_END, LWORDTREE{node:1,BY_INDEX->0,'A'}, ++ " empty KWORDTREE/PREFIXTREE ++ let spl = eval('0z56494D7370656C6C320B0000000008000000001234' ++ \ .. '5678FF000000020101000000410000000000000000') ++ " VIMsug + v1, matching ts, SUGWORDTREE word "a", empty SUGTABLE ++ let sug = 0z56494D737567010000000012345678000000040161010000000000 ++ call writefile(spl, 'Xrtp/spell/xx.utf-8.spl', 'b') ++ call writefile(sug, 'Xrtp/spell/xx.utf-8.sug', 'b') ++ ++ new ++ set runtimepath+=./Xrtp ++ set spelllang=xx ++ set spell ++ " Unpatched: OOB write here (ASan abort, or crash). Patched: returns a list. ++ call assert_equal(v:t_list, type(spellsuggest('helloo'))) ++ ++ set spell& spelllang& runtimepath& ++ bwipe! ++endfunc ++ + " vim: shiftwidth=2 sts=2 expandtab +-- +2.44.4 + diff --git a/meta/recipes-support/vim/vim.inc b/meta/recipes-support/vim/vim.inc index 038751ed74..e867d4c1cd 100644 --- a/meta/recipes-support/vim/vim.inc +++ b/meta/recipes-support/vim/vim.inc @@ -38,6 +38,7 @@ SRC_URI = "git://github.com/vim/vim.git;branch=master;protocol=https \ file://CVE-2026-43961.patch \ file://CVE-2026-47162.patch \ file://CVE-2026-47167.patch \ + file://CVE-2026-55693.patch \ " PV .= ".1683" -- 2.34.1
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