From bd0b427f8bdaecb72d26232368a6b05262eea359 Mon Sep 17 00:00:00 2001 From: Mingli Yu Date: Thu, 9 Apr 2026 14:16:35 +0800 Subject: [PATCH] libxml2: Fix CVE-2026-1757 Backport patch [1] to fix CVE-2026-1757. The shell is refactored [2], so backport the related code from shell.c to debugXML.c. [1] https://gitlab.gnome.org/GNOME/libxml2/-/commit/160c8a43 [2] https://gitlab.gnome.org/GNOME/libxml2/-/commit/1341deac (From OE-Core rev: decc9acf5aaa569e75f1e4986fb72530ad84c887) Signed-off-by: Mingli Yu Signed-off-by: Jinfeng Wang [YC: see https://security-tracker.debian.org/tracker/CVE-2026-1757 ] Signed-off-by: Yoann Congal Signed-off-by: Paul Barker --- .../libxml/libxml2/CVE-2026-1757.patch | 49 +++++++++++++++++++ meta/recipes-core/libxml/libxml2_2.12.10.bb | 1 + 2 files changed, 50 insertions(+) create mode 100644 meta/recipes-core/libxml/libxml2/CVE-2026-1757.patch diff --git a/meta/recipes-core/libxml/libxml2/CVE-2026-1757.patch b/meta/recipes-core/libxml/libxml2/CVE-2026-1757.patch new file mode 100644 index 0000000000..b6e6373ab0 --- /dev/null +++ b/meta/recipes-core/libxml/libxml2/CVE-2026-1757.patch @@ -0,0 +1,49 @@ +From bbe186902eddca01cc2049780a1d1a37937d3862 Mon Sep 17 00:00:00 2001 +From: Mingli Yu +Date: Wed, 25 Feb 2026 16:16:14 +0800 +Subject: [PATCH] shell: free cmdline before continue + +This patch frees the cmdline when it's not empty but it doesn't contain +any actual character. + +If the cmdline is just whitespaces or \r and \n, the loop continues +without freeing the cmdline string, so it's a leak. + +Fix #1009 + +Reference https://gitlab.gnome.org/GNOME/libxml2/-/commit/160c8a43 + +CVE: CVE-2026-1757 + +Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/libxml2/-/commit/160c8a43] + +The shell is refactored [1], so backport the related code from shell.c +to debugXML.c. + +[1] https://gitlab.gnome.org/GNOME/libxml2/-/commit/1341deac + +Signed-off-by: Mingli Yu +--- + debugXML.c | 5 ++++- + 1 file changed, 4 insertions(+), 1 deletion(-) + +diff --git a/debugXML.c b/debugXML.c +index 9d9618f..2d5c99d 100644 +--- a/debugXML.c ++++ b/debugXML.c +@@ -2866,8 +2866,11 @@ xmlShell(xmlDocPtr doc, char *filename, xmlShellReadlineFunc input, + command[i++] = *cur++; + } + command[i] = 0; +- if (i == 0) ++ if (i == 0) { ++ free(cmdline); ++ cmdline = NULL; + continue; ++ } + + /* + * Parse the argument +-- +2.34.1 + diff --git a/meta/recipes-core/libxml/libxml2_2.12.10.bb b/meta/recipes-core/libxml/libxml2_2.12.10.bb index 25da11bd2d..2bfa78324f 100644 --- a/meta/recipes-core/libxml/libxml2_2.12.10.bb +++ b/meta/recipes-core/libxml/libxml2_2.12.10.bb @@ -30,6 +30,7 @@ SRC_URI += "http://www.w3.org/XML/Test/xmlts20130923.tar;subdir=${BP};name=testt file://CVE-2026-0992-01.patch \ file://CVE-2026-0992-02.patch \ file://CVE-2026-0992-03.patch \ + file://CVE-2026-1757.patch \ " SRC_URI[archive.sha256sum] = "c3d8c0c34aa39098f66576fe51969db12a5100b956233dc56506f7a8679be995"