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[2a01:cb00:1331:aa00:a2e4:fb7b:d88:7544]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a1bd972aebsm46376245e9.1.2026.10.14.22.03.48 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Oct 2026 22:03:48 -0700 (PDT) From: Yoann Congal To: openembedded-core@lists.openembedded.org Subject: [OE-core][scarthgap 17/55] libxml2: Fix CVE-2026-86140 Date: Thu, 15 Oct 2026 07:02:40 +0200 Message-ID: <2c45b60e5d543bca0c1a239254d879d1ad7e3a72.1792020605.git.yoann.congal@smile.fr> X-Mailer: git-send-email 2.55.0 In-Reply-To: References: MIME-Version: 1.0 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 ; Thu, 15 Oct 2026 05:03:52 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/247815 From: Hetvi Thakar This patch applies the upstream fix as referenced in [2], using the commit shown in [1]. [1] https://github.com/GNOME/libxml2/commit/d1686f91dbda141a752200419d35639fd6b38340 [2] https://nvd.nist.gov/vuln/detail/CVE-2026-86140 Signed-off-by: Hetvi Thakar Signed-off-by: Yoann Congal --- .../libxml/libxml2/CVE-2026-86140.patch | 56 +++++++++++++++++++ meta/recipes-core/libxml/libxml2_2.12.10.bb | 1 + 2 files changed, 57 insertions(+) create mode 100644 meta/recipes-core/libxml/libxml2/CVE-2026-86140.patch diff --git a/meta/recipes-core/libxml/libxml2/CVE-2026-86140.patch b/meta/recipes-core/libxml/libxml2/CVE-2026-86140.patch new file mode 100644 index 00000000000..bc7e069b092 --- /dev/null +++ b/meta/recipes-core/libxml/libxml2/CVE-2026-86140.patch @@ -0,0 +1,56 @@ +From 7d324fcfa71e8567678ad254c0e10e509ebae99b Mon Sep 17 00:00:00 2001 +From: mohammadmseet-hue +Date: Thu, 16 Apr 2026 02:54:37 +0200 +Subject: [PATCH] fix: add bounds checks to xmlSnprintfElements in valid.c + +CVE-2025-24928 fixed xmlSnprintfElementContent for unchecked strcat() +writes, but the sibling function xmlSnprintfElements has the identical +unfixed pattern. The strcat(buf, "(") before the while loop and +strcat(buf, ")") after the loop exit have no bounds checks. + +Add remaining-space checks before both strcat calls, with early return +and ellipsis when space is insufficient. + +CVE: CVE-2026-86140 +Upstream-Status: Backport [https://github.com/GNOME/libxml2/commit/d1686f91dbda141a752200419d35639fd6b38340] + +(cherry picked from commit d1686f91dbda141a752200419d35639fd6b38340) +Signed-off-by: Hetvi Thakar +--- + valid.c | 16 ++++++++++++++-- + 1 file changed, 14 insertions(+), 2 deletions(-) + +diff --git a/valid.c b/valid.c +index ae4bb822..718e6d85 100644 +--- a/valid.c ++++ b/valid.c +@@ -5047,7 +5047,15 @@ xmlSnprintfElements(char *buf, int size, xmlNodePtr node, int glob) { + int len; + + if (node == NULL) return; +- if (glob) strcat(buf, "("); ++ len = strlen(buf); ++ if (glob) { ++ if (size - len < 50) { ++ if ((size - len > 4) && (buf[len - 1] != '.')) ++ strcat(buf, " ..."); ++ return; ++ } ++ strcat(buf, "("); ++ } + cur = node; + while (cur != NULL) { + len = strlen(buf); +@@ -5111,7 +5119,11 @@ xmlSnprintfElements(char *buf, int size, xmlNodePtr node, int glob) { + } + cur = cur->next; + } +- if (glob) strcat(buf, ")"); ++ if (glob) { ++ len = strlen(buf); ++ if (size - len > 1) ++ strcat(buf, ")"); ++ } + } + + /** diff --git a/meta/recipes-core/libxml/libxml2_2.12.10.bb b/meta/recipes-core/libxml/libxml2_2.12.10.bb index 53e8660366e..98a3e3ce366 100644 --- a/meta/recipes-core/libxml/libxml2_2.12.10.bb +++ b/meta/recipes-core/libxml/libxml2_2.12.10.bb @@ -34,6 +34,7 @@ SRC_URI += "http://www.w3.org/XML/Test/xmlts20130923.tar;subdir=${BP};name=testt file://CVE-2026-11979.patch \ file://CVE-2026-86137.patch \ file://CVE-2026-86138.patch \ + file://CVE-2026-86140.patch \ " SRC_URI[archive.sha256sum] = "c3d8c0c34aa39098f66576fe51969db12a5100b956233dc56506f7a8679be995"