A ghostscript security update has been released for Debian GNU/Linux 9 LTS to address a security vulnerability.

DLA 2989-1: ghostscript security update

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Debian LTS Advisory DLA-2989-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Markus Koschany
May 01, 2022   https://wiki.debian.org/LTS
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Package : ghostscript
Version : 9.26a~dfsg-0+deb9u9
CVE ID : CVE-2019-25059

A security vulnerability was found in Ghostscript, the GPL PostScript/PDF
interpreter. It was discovered that some privileged Postscript operators
remained accessible from various places. For instance a specially crafted
PostScript file could use this flaw in order to have access to the file
system outside of the constrains imposed by -dSAFER.

This problem exists because of an incomplete fix for CVE-2019-3839.

For Debian 9 stretch, this problem has been fixed in version
9.26a~dfsg-0+deb9u9.

We recommend that you upgrade your ghostscript packages.

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

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