A cairo security update has been released for Debian GNU/Linux 9 LTS to address an issue where slideshow aborts with stack smashing in cairo’s composite_boxes.

DLA 2518-1: cairo security update

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Debian LTS Advisory DLA-2518-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
January 06, 2021   https://wiki.debian.org/LTS
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Package : cairo
Version : 1.14.8-1+deb9u1
CVE ID : CVE-2020-35492
Debian Bug : 978658

LibreOffice slideshow aborts with stack smashing in cairo’s
composite_boxes.

For Debian 9 stretch, this problem has been fixed in version
1.14.8-1+deb9u1.

We recommend that you upgrade your cairo packages.

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

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