From: Deepak Rathore <[email protected]> This patch applies the upstream fix shown in [1] as referenced by [2].
[1] https://github.com/libexpat/libexpat/commit/babfc48090977cbf7be24b2c48f6053dca75c164 [2] https://nvd.nist.gov/vuln/detail/CVE-2026-56404 Signed-off-by: Deepak Rathore <[email protected]> --- .../expat/expat/CVE-2026-56404.patch | 45 +++++++++++++++++++ meta/recipes-core/expat/expat_2.6.4.bb | 1 + 2 files changed, 46 insertions(+) create mode 100644 meta/recipes-core/expat/expat/CVE-2026-56404.patch diff --git a/meta/recipes-core/expat/expat/CVE-2026-56404.patch b/meta/recipes-core/expat/expat/CVE-2026-56404.patch new file mode 100644 index 0000000000..d147a7502c --- /dev/null +++ b/meta/recipes-core/expat/expat/CVE-2026-56404.patch @@ -0,0 +1,45 @@ +From d8e09a54fa9214e64d8e73057ca6918d08857022 Mon Sep 17 00:00:00 2001 +From: netliomax25-code <[email protected]> +Date: Thu, 28 May 2026 12:44:11 +0530 +Subject: [PATCH 04/17] lib: protect function addBinding from signed integer + overflow + +CVE: CVE-2026-56404 +Upstream-Status: Backport [https://github.com/libexpat/libexpat/commit/babfc48090977cbf7be24b2c48f6053dca75c164] + +(cherry picked from commit babfc48090977cbf7be24b2c48f6053dca75c164) +Signed-off-by: Deepak Rathore <[email protected]> +--- + expat/lib/xmlparse.c | 11 ++++++++++- + 1 file changed, 10 insertions(+), 1 deletion(-) + +diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c +index 12bbe23e..9d21e136 100644 +--- a/expat/lib/xmlparse.c ++++ b/expat/lib/xmlparse.c +@@ -4456,6 +4456,10 @@ addBinding(XML_Parser parser, PREFIX *prefix, const ATTRIBUTE_ID *attId, + } + + for (len = 0; uri[len]; len++) { ++ /* Detect and prevent signed integer overflow */ ++ if (len == INT_MAX) { ++ return XML_ERROR_NO_MEMORY; ++ } + if (isXML && (len > xmlLen || uri[len] != xmlNamespace[len])) + isXML = XML_FALSE; + +@@ -4496,8 +4500,13 @@ addBinding(XML_Parser parser, PREFIX *prefix, const ATTRIBUTE_ID *attId, + if (isXMLNS) + return XML_ERROR_RESERVED_NAMESPACE_URI; + +- if (parser->m_namespaceSeparator) ++ if (parser->m_namespaceSeparator) { ++ /* Detect and prevent signed integer overflow */ ++ if (len == INT_MAX) { ++ return XML_ERROR_NO_MEMORY; ++ } + len++; ++ } + if (parser->m_freeBindingList) { + b = parser->m_freeBindingList; + if (len > b->uriAlloc) { diff --git a/meta/recipes-core/expat/expat_2.6.4.bb b/meta/recipes-core/expat/expat_2.6.4.bb index acd943b4e6..815b31fc10 100644 --- a/meta/recipes-core/expat/expat_2.6.4.bb +++ b/meta/recipes-core/expat/expat_2.6.4.bb @@ -54,6 +54,7 @@ SRC_URI = "${GITHUB_BASE_URI}/download/R_${VERSION_TAG}/expat-${PV}.tar.bz2 \ file://CVE-2026-56403_p1.patch;striplevel=2 \ file://CVE-2026-56403_p2.patch;striplevel=2 \ file://CVE-2026-56408.patch;striplevel=2 \ + file://CVE-2026-56404.patch;striplevel=2 \ " GITHUB_BASE_URI = "https://github.com/libexpat/libexpat/releases/";
-=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#241142): https://lists.openembedded.org/g/openembedded-core/message/241142 Mute This Topic: https://lists.openembedded.org/mt/120311081/21656 Group Owner: [email protected] Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
