Several vulnerabilities have been discovered in the OpenJDK Java runtime, which may result in bypass of sandbox restrictions, information disclosure, reduced cryptographic strength of the AES implementation, directory traversal or denial of service.
For Debian 10 buster, these problems have been fixed in version 11.0.20+8-1~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 LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS