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/528a4e5017e1bd3b48b689fd0c131df940ae3ea5 [2] https://nvd.nist.gov/vuln/detail/CVE-2026-56411 Signed-off-by: Deepak Rathore <[email protected]> --- .../expat/expat/CVE-2026-56411.patch | 50 +++++++++++++++++++ meta/recipes-core/expat/expat_2.6.4.bb | 1 + 2 files changed, 51 insertions(+) create mode 100644 meta/recipes-core/expat/expat/CVE-2026-56411.patch diff --git a/meta/recipes-core/expat/expat/CVE-2026-56411.patch b/meta/recipes-core/expat/expat/CVE-2026-56411.patch new file mode 100644 index 0000000000..819638ca22 --- /dev/null +++ b/meta/recipes-core/expat/expat/CVE-2026-56411.patch @@ -0,0 +1,50 @@ +From 5e696e78f8c4a709c4f774973b142e57090c4364 Mon Sep 17 00:00:00 2001 +From: netliomax25-code <[email protected]> +Date: Tue, 2 Jun 2026 13:13:34 +0530 +Subject: [PATCH 11/17] xmlwf: protect notation list allocation from integer + overflow + +CVE: CVE-2026-56411 +Upstream-Status: Backport [https://github.com/libexpat/libexpat/commit/528a4e5017e1bd3b48b689fd0c131df940ae3ea5] + +Backport Changes: +- Use Scarthgap 2.6.4 freeNotations cleanup and return directly + because the newer shared cleanUp label is absent. + +(cherry picked from commit 528a4e5017e1bd3b48b689fd0c131df940ae3ea5) +Signed-off-by: Deepak Rathore <[email protected]> +--- + expat/xmlwf/xmlwf.c | 12 ++++++++++-- + 1 file changed, 10 insertions(+), 2 deletions(-) + +diff --git a/expat/xmlwf/xmlwf.c b/expat/xmlwf/xmlwf.c +index bd5f68a4..6a3d31b7 100644 +--- a/expat/xmlwf/xmlwf.c ++++ b/expat/xmlwf/xmlwf.c +@@ -387,9 +387,9 @@ static void XMLCALL + endDoctypeDecl(void *userData) { + XmlwfUserData *data = (XmlwfUserData *)userData; + NotationList **notations; +- int notationCount = 0; ++ size_t notationCount = 0; + NotationList *p; +- int i; ++ size_t i; + + /* How many notations do we have? */ + for (p = data->notationListHead; p != NULL; p = p->next) +@@ -401,6 +401,14 @@ endDoctypeDecl(void *userData) { + return; + } + ++ /* Detect and prevent integer overflow in the multiplication, mirroring ++ the guards in xcsdup() and resolveSystemId() */ ++ if (notationCount > SIZE_MAX / sizeof(NotationList *)) { ++ fprintf(stderr, "Unable to sort notations"); ++ freeNotations(data); ++ return; ++ } ++ + notations = malloc(notationCount * sizeof(NotationList *)); + if (notations == NULL) { + fprintf(stderr, "Unable to sort notations"); diff --git a/meta/recipes-core/expat/expat_2.6.4.bb b/meta/recipes-core/expat/expat_2.6.4.bb index 8d7a19e79d..3a880882ae 100644 --- a/meta/recipes-core/expat/expat_2.6.4.bb +++ b/meta/recipes-core/expat/expat_2.6.4.bb @@ -61,6 +61,7 @@ SRC_URI = "${GITHUB_BASE_URI}/download/R_${VERSION_TAG}/expat-${PV}.tar.bz2 \ file://CVE-2026-56406-dependent.patch;striplevel=2 \ file://CVE-2026-56406.patch;striplevel=2 \ file://CVE-2026-56409.patch;striplevel=2 \ + file://CVE-2026-56411.patch;striplevel=2 \ " GITHUB_BASE_URI = "https://github.com/libexpat/libexpat/releases/";
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