From: Hetvi Thakar <[email protected]> This patch applies the upstream fix as referenced in [2], using the commit shown in [1].
[1] https://github.com/GNOME/libxml2/commit/6b3a736c0edc74ceec3d82f5252499d7911b3a58 [2] https://nvd.nist.gov/vuln/detail/CVE-2026-86142 Signed-off-by: Hetvi Thakar <[email protected]> --- .../libxml/libxml2/CVE-2026-86142.patch | 37 +++++++++++++++++++ meta/recipes-core/libxml/libxml2_2.12.10.bb | 1 + 2 files changed, 38 insertions(+) create mode 100644 meta/recipes-core/libxml/libxml2/CVE-2026-86142.patch diff --git a/meta/recipes-core/libxml/libxml2/CVE-2026-86142.patch b/meta/recipes-core/libxml/libxml2/CVE-2026-86142.patch new file mode 100644 index 0000000000..d63d8cdceb --- /dev/null +++ b/meta/recipes-core/libxml/libxml2/CVE-2026-86142.patch @@ -0,0 +1,37 @@ +From 51f0e78349cbbc9081f14e02f440733e5880fb3d Mon Sep 17 00:00:00 2001 +From: Daniel Garcia Moreno <[email protected]> +Date: Mon, 4 May 2026 09:32:43 +0200 +Subject: [PATCH] xpointer: Check overflow in xmlXPtrEvalXPtrPart + +Fix https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1113 + +CVE: CVE-2026-86142 +Upstream-Status: Backport [https://github.com/GNOME/libxml2/commit/6b3a736c0edc74ceec3d82f5252499d7911b3a58] + +Backport Changes: +- Use xmlXPathErr(ctxt, XPATH_MEMORY_ERROR) because the Scarthgap xpointer implementation does not provide the newer xmlXPathPErrMemory() call shape. This preserves the XPath parser error state as well as reporting the allocation failure. + +(cherry picked from commit 6b3a736c0edc74ceec3d82f5252499d7911b3a58) +Signed-off-by: Hetvi Thakar <[email protected]> +--- + xpointer.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +diff --git a/xpointer.c b/xpointer.c +index 6e1e5f46..f5457c9f 100644 +--- a/xpointer.c ++++ b/xpointer.c +@@ -956,6 +956,13 @@ xmlXPtrEvalXPtrPart(xmlXPathParserContextPtr ctxt, xmlChar *name) { + level = 1; + + len = xmlStrlen(ctxt->cur); ++ /* Overflow in xmlStrlen */ ++ if (len == 0 && ctxt->cur != NULL && *ctxt->cur != 0) { ++ xmlXPathErr(ctxt, XPATH_MEMORY_ERROR); ++ xmlFree(name); ++ return; ++ } ++ + len++; + buffer = (xmlChar *) xmlMallocAtomic(len); + if (buffer == NULL) { diff --git a/meta/recipes-core/libxml/libxml2_2.12.10.bb b/meta/recipes-core/libxml/libxml2_2.12.10.bb index 49a1a8dbaa..881b60133d 100644 --- a/meta/recipes-core/libxml/libxml2_2.12.10.bb +++ b/meta/recipes-core/libxml/libxml2_2.12.10.bb @@ -36,6 +36,7 @@ SRC_URI += "http://www.w3.org/XML/Test/xmlts20130923.tar;subdir=${BP};name=testt file://CVE-2026-86138.patch \ file://CVE-2026-86140.patch \ file://CVE-2026-86141.patch \ + file://CVE-2026-86142.patch \ " SRC_URI[archive.sha256sum] = "c3d8c0c34aa39098f66576fe51969db12a5100b956233dc56506f7a8679be995" -- 2.35.6
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