An openjdk-11 security update has been released for Debian GNU/Linux 10 to address an incompletely enforced configuration settings used in the Jar signing verification.

DSA 4899-1: openjdk-11 security update

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Debian Security Advisory DSA-4899-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
April 23, 2021   https://www.debian.org/security/faq
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Package : openjdk-11
CVE ID : CVE-2021-2161

It was discovered that the OpenJDK Java platform incompletely enforced
configuration settings used in Jar signing verifications.

For the stable distribution (buster), this problem has been fixed in
version 11.0.11+9-1~deb10u1.

We recommend that you upgrade your openjdk-11 packages.

For the detailed security status of openjdk-11 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/openjdk-11

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/