An openjdk-8 security has been released for Debian GNU/Linux 9 LTS to address several vulnerabilities.

DLA 2917-1: openjdk-8 security update

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Debian LTS Advisory DLA-2917-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
February 10, 2022   https://wiki.debian.org/LTS
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Package : openjdk-8
Version : 8u322-b06-1~deb9u1
CVE ID : CVE-2022-21248 CVE-2022-21282 CVE-2022-21283 CVE-2022-21293
CVE-2022-21294 CVE-2022-21296 CVE-2022-21299 CVE-2022-21305
CVE-2022-21340 CVE-2022-21341 CVE-2022-21349 CVE-2022-21360
CVE-2022-21365

Several vulnerabilities have been discovered in the OpenJDK Java runtime,
which may result in denial of service, bypass of deserialization
restrictions or information disclosure.

For Debian 9 stretch, these problems have been fixed in version
8u322-b06-1~deb9u1.

We recommend that you upgrade your openjdk-8 packages.

For the detailed security status of openjdk-8 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/openjdk-8

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