system
Provide references for <CVE-2018-9918>.
user
Where can I find more information about <CVE-2018-9918>?
assistant
References are available at: https://usn.ubuntu.com/3638-1/, https://github.com/qpdf/qpdf/commit/b4d6cf6836ce025ba1811b7bbec52680c7204223, https://github.com/qpdf/qpdf/issues/202.