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d="scan'208";a="511916691" Received: from rcdn-l-core-02.cisco.com ([173.37.255.139]) by rcdn-iport-9.cisco.com with ESMTP/TLS/TLS_AES_256_GCM_SHA384; 20 Jul 2026 12:20:22 +0000 Received: from bgl-ads-3413.cisco.com (bgl-ads-3413.cisco.com [173.39.60.50]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "ciscoit-managed-infra-smtp-auth.cisco.com", Issuer "Internal Private TLS SubCA" (verified OK)) by rcdn-l-core-02.cisco.com (Postfix) with ESMTPS id 4D6F818000368 for ; Mon, 20 Jul 2026 12:20:22 +0000 (GMT) Received: by bgl-ads-3413.cisco.com (Postfix, from userid 1795984) id 712DDCC037D; Mon, 20 Jul 2026 17:50:20 +0530 (IST) From: "Deepak Rathore -X (deeratho - E INFOCHIPS PRIVATE LIMITED at Cisco)" To: openembedded-core@lists.openembedded.org Subject: [OE-core][wrynose][PATCH v2 07/10] expat: fix CVE-2026-56409 Date: Mon, 20 Jul 2026 17:46:12 +0530 Message-Id: <20260720121615.2520859-8-deeratho@cisco.com> X-Mailer: git-send-email 2.35.6 In-Reply-To: <20260720121615.2520859-1-deeratho@cisco.com> References: <20260710130809.2817559-1-deeratho@cisco.com> <20260720121615.2520859-1-deeratho@cisco.com> MIME-Version: 1.0 X-Outbound-Client-TLS: VERIFIED;bgl-ads-3413.cisco.com [173.39.60.50];TLSv1.3;TLS_AES_256_GCM_SHA384;256;ciscoit-managed-infra-smtp-auth.cisco.com X-Outbound-SMTP-Client: 173.39.60.50, bgl-ads-3413.cisco.com X-Outbound-Node: rcdn-l-core-02.cisco.com 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, 20 Jul 2026 12:20:28 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/241384 From: Deepak Rathore This patch applies the upstream fix shown in [1] as referenced by [2]. [1] https://github.com/libexpat/libexpat/commit/61f7cdda22546c4bee38dd2d3fa3d6e4aa64d33e [2] https://nvd.nist.gov/vuln/detail/CVE-2026-56409 Signed-off-by: Deepak Rathore --- - Changes from v1 to v2: Refresh the patch on top of latest wrynose branch merged commits. .../expat/expat/CVE-2026-56409.patch | 53 +++++++++++++++++++ meta/recipes-core/expat/expat_2.7.5.bb | 1 + 2 files changed, 54 insertions(+) create mode 100644 meta/recipes-core/expat/expat/CVE-2026-56409.patch diff --git a/meta/recipes-core/expat/expat/CVE-2026-56409.patch b/meta/recipes-core/expat/expat/CVE-2026-56409.patch new file mode 100644 index 0000000000..ff0e650a2a --- /dev/null +++ b/meta/recipes-core/expat/expat/CVE-2026-56409.patch @@ -0,0 +1,53 @@ +From 10938bc2cef7573087566b5b1c948061baa68b98 Mon Sep 17 00:00:00 2001 +From: netliomax25-code +Date: Mon, 1 Jun 2026 11:53:19 +0530 +Subject: [PATCH] xmlwf: protect output path join from integer overflow + +CVE: CVE-2026-56409 +Upstream-Status: Backport [https://github.com/libexpat/libexpat/commit/61f7cdda22546c4bee38dd2d3fa3d6e4aa64d33e] + +Backport Changes: +- Adapt the allocation hunk to the explicit cast used by Expat 2.7.5. + +(cherry picked from commit 61f7cdda22546c4bee38dd2d3fa3d6e4aa64d33e) +Signed-off-by: Deepak Rathore +--- + expat/xmlwf/xmlwf.c | 22 ++++++++++++++++++++-- + 1 file changed, 20 insertions(+), 2 deletions(-) + +diff --git a/expat/xmlwf/xmlwf.c b/expat/xmlwf/xmlwf.c +index 06416454..6a0a707a 100644 +--- a/expat/xmlwf/xmlwf.c ++++ b/expat/xmlwf/xmlwf.c +@@ -1236,8 +1236,26 @@ tmain(int argc, XML_Char **argv) { + } + #endif + } +- outName = (XML_Char *)malloc((tcslen(outputDir) + tcslen(file) + 2) +- * sizeof(XML_Char)); ++ const size_t outputDirLen = tcslen(outputDir); ++ const size_t fileLen = tcslen(file); ++ ++ /* Detect and prevent integer overflow in the addition (without ++ risking underflow) and the multiplication, mirroring the guards ++ in xcsdup() and resolveSystemId() */ ++ if (outputDirLen > SIZE_MAX - fileLen ++ || outputDirLen > SIZE_MAX - fileLen - 2) { ++ tperror(T("Could not allocate memory")); ++ exit(XMLWF_EXIT_INTERNAL_ERROR); ++ } ++ ++ const size_t charsRequired = outputDirLen + fileLen + 2; ++ ++ if (charsRequired > SIZE_MAX / sizeof(XML_Char)) { ++ tperror(T("Could not allocate memory")); ++ exit(XMLWF_EXIT_INTERNAL_ERROR); ++ } ++ ++ outName = malloc(charsRequired * sizeof(XML_Char)); + if (! outName) { + tperror(T("Could not allocate memory")); + exit(XMLWF_EXIT_INTERNAL_ERROR); +-- +2.43.7 + diff --git a/meta/recipes-core/expat/expat_2.7.5.bb b/meta/recipes-core/expat/expat_2.7.5.bb index f14e39c00b..cb8f9dd1ac 100644 --- a/meta/recipes-core/expat/expat_2.7.5.bb +++ b/meta/recipes-core/expat/expat_2.7.5.bb @@ -28,6 +28,7 @@ SRC_URI = "${GITHUB_BASE_URI}/download/R_${VERSION_TAG}/expat-${PV}.tar.bz2 \ file://CVE-2026-56410_p2.patch;striplevel=2 \ file://CVE-2026-56406-dependent.patch;striplevel=2 \ file://CVE-2026-56406.patch;striplevel=2 \ + file://CVE-2026-56409.patch;striplevel=2 \ " GITHUB_BASE_URI = "https://github.com/libexpat/libexpat/releases/"