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Sun, 26 Jul 2026 23:20:37 -0700 (PDT) Received: from MVIN00030.mvista.com ([157.32.44.234]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-314bc3e1255sm42733554eec.4.2026.07.26.23.20.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 26 Jul 2026 23:20:37 -0700 (PDT) From: Siddharth To: openembedded-core@lists.openembedded.org Cc: Siddharth Doshi Subject: [OE-core][wrynose][PATCHv2 5/6] vim: Security Fix for CVE-2026-55892 Date: Mon, 27 Jul 2026 11:48:16 +0530 Message-Id: <20260727061817.8586-5-sdoshi@mvista.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260727061817.8586-1-sdoshi@mvista.com> References: <20260727061817.8586-1-sdoshi@mvista.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Mon, 27 Jul 2026 06:20:41 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/242036 From: Siddharth Doshi Picking patch as per [1], and same patch is mentioned in [2] References: [1] https://nvd.nist.gov/vuln/detail/CVE-2026-55892 [2] https://security-tracker.debian.org/tracker/CVE-2026-55892 Signed-off-by: Siddharth Doshi --- .../vim/files/CVE-2026-55892.patch | 95 +++++++++++++++++++ meta/recipes-support/vim/vim.inc | 1 + 2 files changed, 96 insertions(+) create mode 100644 meta/recipes-support/vim/files/CVE-2026-55892.patch diff --git a/meta/recipes-support/vim/files/CVE-2026-55892.patch b/meta/recipes-support/vim/files/CVE-2026-55892.patch new file mode 100644 index 0000000000..fc43095362 --- /dev/null +++ b/meta/recipes-support/vim/files/CVE-2026-55892.patch @@ -0,0 +1,95 @@ +From 8325b193bba5f01e7a7d8241fc8633d93dff996b Mon Sep 17 00:00:00 2001 +From: Yasuhiro Matsumoto +Date: Tue, 16 Jun 2026 20:32:21 +0000 +Subject: [PATCH] patch 9.2.0662: [security] Stack out-of-bounds write in + dump_prefixes() + +Problem: [security]: a crafted spell file with a self-referential + BY_INDEX node in the prefix tree can drive dump_prefixes() + past the end of its MAXWLEN-sized depth arrays on :spelldump + (cipher-creator) +Solution: only descend while depth < MAXWLEN - 1, as the sibling trie + walkers already do (Yasuhiro Matsumoto) + +Github Security Advisory: +https://github.com/vim/vim/security/advisories/GHSA-qm9w-fmpj-879h + +Supported by AI + +Signed-off-by: Yasuhiro Matsumoto +Signed-off-by: Christian Brabandt + +Upstream-Status: Backport [https://github.com/vim/vim/commit/8325b193bba5f01e7a7d8241fc8633d93dff996b] +CVE: CVE-2026-55892 +Signed-off-by: Siddharth Doshi +--- + src/spell.c | 2 +- + src/testdir/test_spell.vim | 27 +++++++++++++++++++++++++++ + src/version.c | 2 ++ + 3 files changed, 30 insertions(+), 1 deletion(-) + +diff --git a/src/spell.c b/src/spell.c +index 01eb57e3a9..72d1f0b521 100644 +--- a/src/spell.c ++++ b/src/spell.c +@@ -4325,7 +4325,7 @@ dump_prefixes( + } + } + } +- else ++ else if (depth < MAXWLEN - 1) + { + // Normal char, go one level deeper. + prefix[depth++] = c; +diff --git a/src/testdir/test_spell.vim b/src/testdir/test_spell.vim +index 58a2d58707..77eac49fd8 100644 +--- a/src/testdir/test_spell.vim ++++ b/src/testdir/test_spell.vim +@@ -1581,4 +1581,31 @@ func Test_suggest_spell_restore() + bwipe! + endfunc + ++" A crafted .spl with a self-referential BY_INDEX node in the PREFIXTREE drove ++" dump_prefixes() past its MAXWLEN-sized depth arrays (stack out-of-bounds ++" write). The tree parses cleanly (shared refs aren't recursed); the walk ++" happens on :spelldump. Reaching the assert means no OOB. Same class as the ++" tree_count_words() fix (9.2.0653). ++func Test_spelldump_prefixtree_overflow() ++ CheckUnix ++ call mkdir('Xrtp/spell', 'pR') ++ " VIMspell + v50, SN_PREFCOND(prefixcnt=1), SN_END, ++ " LWORDTREE word "a" with affixID=1 (so dump_prefixes runs), ++ " empty KWORDTREE, PREFIXTREE child BY_INDEX -> nodeidx 0 (self-cycle), 'A' ++ let spl = eval('0z56494D7370656C6C32030000000003000100FF00000004' ++ \ .. '0161010220010000000000000002010100000041') ++ call writefile(spl, 'Xrtp/spell/xx.utf-8.spl', 'b') ++ ++ new ++ set runtimepath+=./Xrtp ++ set spelllang=xx ++ set spell ++ spelldump ++ call assert_true(line('$') > 1) ++ ++ set spell& spelllang& runtimepath& ++ bwipe! ++ bwipe! ++endfunc ++ + " vim: shiftwidth=2 sts=2 expandtab +diff --git a/src/version.c b/src/version.c +index 03a520b146..b40bd9be93 100644 +--- a/src/version.c ++++ b/src/version.c +@@ -734,6 +734,8 @@ static char *(features[]) = + + static int included_patches[] = + { /* Add new patch number below this line */ ++/**/ ++ 662, + /**/ + 496, + /**/ +-- +2.34.1 + diff --git a/meta/recipes-support/vim/vim.inc b/meta/recipes-support/vim/vim.inc index 7a4a0bc932..f423e4d5cb 100644 --- a/meta/recipes-support/vim/vim.inc +++ b/meta/recipes-support/vim/vim.inc @@ -27,6 +27,7 @@ SRC_URI = "git://github.com/vim/vim.git;branch=master;protocol=https;tag=v${PV} file://CVE-2026-43961.patch \ file://CVE-2026-47162.patch \ file://CVE-2026-47167.patch \ + file://CVE-2026-55892.patch \ " PV .= ".0340" -- 2.34.1