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Fix CVE-2023-45322: libxml2 through 2.11.5 has a use-after-free that can only occur after a certain memory allocation fails. This occurs in xmlUnlinkNode in tree.c. NOTE: the vendor's position is "I don't think these issues are critical enough to warrant a CVE ID ... because an attacker typically can't control when memory allocations fail." https://gitlab.gnome.org/GNOME/libxml2/-/blob/v2.11.6/NEWS Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> (cherry picked from commit e5af07dce9eb2333a863b09ac1c06eb35f3adb70) Signed-off-by: Peter Korsgaard <peter@korsgaard.com>