A sane-backends regression update has been released for Debian GNU/Linux 9 LTS to fix a regression introduced by the previous update.

DLA 2332-2: sane-backends regression update

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Debian LTS Advisory DLA-2332-2 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/
October 07, 2020   https://wiki.debian.org/LTS
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Package : sane-backends
Version : 1.0.25-4.1+deb9u2
CVE ID : CVE-2020-12862 CVE-2020-12863 CVE-2020-12865 CVE-2020-12867
Debian Bug : 961302

A regression was introduced in DLA-2332-1, where changes in the Debian
package building process triggered a bug in the sane-backends
packages, causing missing files.

For Debian 9 stretch, this problem has been fixed in version
1.0.25-4.1+deb9u2.

We recommend that you upgrade your sane-backends packages.

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

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