Versions mentioned in the description apply to the upstream
Remediation section below for
Debian:9 relevant versions.
There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability.
libxml2 to version 2.9.4+dfsg1-2.2+deb9u4 or higher.