An openexr security update has been released for Debian GNU/Linux 9 LTS to address several vulnerabilities.

DLA 2732-1: openexr security update

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Debian LTS Advisory DLA-2732-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Sylvain Beucler
August 04, 2021   https://wiki.debian.org/LTS
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Package : openexr
Version : 2.2.0-11+deb9u4
CVE ID : CVE-2021-3605 CVE-2021-20299 CVE-2021-20300 CVE-2021-20302
CVE-2021-20303
Debian Bug : 990899

Several vulnerabilities were discovered in OpenEXR, a library and
tools for the OpenEXR high dynamic-range (HDR) image format. An
attacker could cause a denial of service (DoS) through application
crash, and possibly execute code.

For Debian 9 stretch, these problems have been fixed in version
2.2.0-11+deb9u4.

We recommend that you upgrade your openexr packages.

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

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