A redis security update has been released for Debian GNU/Linux 9 LTS to address several integer overflow issues.

DLA 2717-1: redis security update

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Debian LTS Advisory DLA-2717-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Chris Lamb
July 22, 2021   https://wiki.debian.org/LTS
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Package : redis
Version : 3:3.2.6-3+deb9u5
CVE ID : CVE-2021-32761
Debian Bug : #991375

It was discovered that there were several integer overflow issues in
Redis, a popular key-value database system. Some BITFIELD-related
commands were affected on 32-bit systems.

For Debian 9 "Stretch", this problem has been fixed in version
3:3.2.6-3+deb9u5.

We recommend that you upgrade your redis packages.

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

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