An openjdk-11 security update has been released for Debian GNU/Linux 10 to address several vulnerabilities.

DSA 4946-1: openjdk-11 security update

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Debian Security Advisory DSA-4946-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
July 29, 2021   https://www.debian.org/security/faq
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Package : openjdk-11
CVE ID : CVE-2021-2341 CVE-2021-2369 CVE-2021-2388

Several vulnerabilities have been discovered in the OpenJDK Java runtime,
resulting in bypass of sandbox restrictions, incorrect validation of
signed Jars or information disclosure.

For the stable distribution (buster), these problems have been fixed in
version 11.0.12+7-2~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/