A libextractor security update has been released for Debian GNU/Linux 9 LTS to address an invalid read for malformed DVI files.

DLA 2851-1: libextractor security update

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Debian LTS Advisory DLA-2851-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Adrian Bunk
December 26, 2021   https://wiki.debian.org/LTS
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Package : libextractor
Version : 1:1.3-4+deb9u4
CVE ID : CVE-2019-15531
Debian Bug : 935553

Invalid read for malformed DVI files was fixed in GNU libextractor,
a library that extracts meta-data from files of arbitrary type.

For Debian 9 stretch, this problem has been fixed in version
1:1.3-4+deb9u4.

We recommend that you upgrade your libextractor packages.

For the detailed security status of libextractor please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/libextractor

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS