Liberica JDK 20.0.1+10 Release Notes

The full version string for this update release is 20.0.1+10. The version number is 20.

Liberica JDK 20.0.1+10

Liberica is a certified, Java SE 20-compliant distribution of OpenJDK 20 which works on server (Linux x86_64, Linux ARM64, Windows 64), desktop (Windows 64, Windows 32, Mac, Linux x86_64), and embedded devices (Linux ARM64, Linux ARMv7, including Raspberry Pi 2 & 3 (ARMv6 hardfloat)). It has the following notable additions:

  • Linux x86_64 version contains experimental support for ZGC.
  • Linux x86_64, ARMv8 and ARMv7 distributions include a choice of Client VM, Server VM and Minimal VM.
  • Alpine Linux x86_64 version is build with musl support.
  • Windows x86_64, Windows x86, Windows ARMv8, Mac, Linux x86_64, Linux x86 and Linux ARMv7 distributions contain OpenJFX 20.
  • Linux ARMv7 distribution contains Device IO API compiled for Raspberry Pi.

Please refer to the Oracle JDK 20.0.1 release notes for further information on JDK 20 features. This document further outlines the peculiarities of Liberica distribution as compared to Oracle JDK 20 distribution.

Supported Server and Desktop configurations

Liberica is supported on the following OSes:

  • Ubuntu Linux 16.04, 18.04, 20.04 (x86, x86_64, ARMv7, ARMv8)
  • Debian Linux 8, 9, 10 (x86, x86_64, ARMv7, ARMv8)
  • Red Hat, Oracle Linux and CentOS 8x, 6.x, 7.x (x86, x86_64, ARMv7, ARMv8)
  • Alpine Linux 3.7+ (x86_64, ARMv8)
  • SUSE Linux Enterprise 12, 15 and tumbleweed (x86_64, ARMv8)
  • Apple macOS 10.11+ (x86_64, ARMv8)
  • Microsoft Windows 2019, Windows 2016, Windows 2012 R2, Windows 10, Windows 8, Windows 7 (x86, x86_64, ARMv8)

It is also known to work on other Linux distributions and Windows versions.

Note: The minimum supported Linux kernel version is 2.6.18 and GLIBC version 2.6. LibericaFX works on all supported Ubuntu versions, Red Hat Linux family starting from 7.x and SUSE versions with GTK3 backend.

Supported Embedded configurations

Liberica is tested and certified on Raspberry Pi 2, 3 and 4 running the following OSes:

  • Raspbian OS (armhf)
  • OpenSUSE (armv8)

It is also known to work with Debian (armhf) and Ubuntu (armhf).

Liberica JDK 20 distribution

Liberica JDK 20 are distributed as .rpm, .zip, .deb and .tar.gz packages. Please select the one which is most appropriate for your purposes.

Liberica JDK 20 introduced all new features supported by OpenJDK 20.

With the introduction of the Jigsaw feature in JDK 9 and Minimal VM it is now possible to create a Runtime that is sufficient to run your application and trim down the size of the Runtime. To generate a Runtime with just the Minimal VM, add --vm=minimal to jlink options.

Liberica JDK continues to provide support for AOT and Graal JIT. Since in OpenJDK 20 builds these features are deemed experimental and deprecated, it is recommended to compile native executables with Liberica Native Image Kit to avoid errors.

By default, the Liberica uses Server VM. Server VM and Client VM can be enabled with -server and -client command line options, respectively. In case the deployment requires to minimize the footprint, it may be beneficial to use Minimal VM, which emphasises on a minimal footprint. It has C1 JIT compiler only, Serial GC and no serviceability features.

LibericaFX for the Raspberry Pi

Liberica JDK 20 come with a bundled LibericaFX implementation, which is based on OpenJFX. The following tables lists Java FX modules status of Liberica distribution

  • Java FX Graphics - works.
  • Java FX Controls - works.
  • Java FX Media - does not work.
  • Java FX Webkit - does not work.

The following pipelines are known to work: EGL, SW (direct framebuffer) and GTK. By default, Liberica tries to use the accelerated EGL pipeline, which requires the presence of EGL libraries. If they are not found, the implementation falls back to software rendering.

Use the following command line options to specify the rendering pipeline:

  • -Dprism.order=sw forces the use of software rendering pipeline. *
  • -Dprism.order=es2 forces the use of EGL pipeline and hardware acceleration. *
  • -Djavafx.platform=gtk if you would like to launch a LibericaFX application using Liberica from X11.

* Not supported on Raspberry Pi 4.

Please refer to the following wiki for more information.

Device IO API for the Raspberry Pi

Liberica JDK 20 comes with a bundled OpenJDK Device I/O (DIO) API implementation module. DIO provides a Java API for accessing Raspberry PI GPIO pins and for communicating with peripheral devices:

  • General Purpose Input/Output (GPIO).
  • Inter-Integrated Circuit Bus (I2C), Serial Peripheral Interface (SPI).
  • Universal Asynchronous Receiver/Transmitter (UART).

Please refer to the following wiki for more information.

Security Baselines

BellSoft Liberica follows the security baselines for Oracle Java SE. Please refer to the Oracle documentation for a list of issues fixed in a given release.

Known Issues

LibericaFX and EGL on Raspbian

As of 2017, the default location of Broadcom and has changed in Raspbian OS. If you'd like to leverage hardware EGL acceleration available from Broadcom video drivers in LibericaFX while running a recent Raspbian OS, run the following command:

cd /opt/vc/lib
sudo ln -s
sudo ln -s


This is the list of the security issues fixed in this release. CVSS scores are provided using the CVSS version 3.1 scoring system.

CVE ID Score Component Module Attack vector Complexity Privileges User interaction Scope Confidentiality Integrity Availability
CVE-2023-21930 7.4 security-libs network high none none unchanged high high none
CVE-2023-21967 5.9 security-libs network high none none unchanged none none high
CVE-2023-21939 5.3 client-libs javax.swing network low none none unchanged none low none
CVE-2023-21938 3.7 core-libs java.lang network high none none unchanged none low none
CVE-2023-21937 3.7 core-libs network high none none unchanged none low none
CVE-2023-21968 3.7 core-libs java.nio network high none none unchanged none low None

Issues fixed

Issue Description
JDK-8299781 Improve JFX navigation
JDK-8299977 Update WebKit to 615.1
JDK-8300954 HTML default Range input control not rendered
JDK-8301022 Video distortion is observed while playing youtube video
JDK-8301712 [linux] Crash on exit from WebKit 615.1
JDK-8302294 Cherry-pick WebKit 615.1 stabilization fixes
JDK-8302684 Cherry-pick WebKit 615.1 stabilization fixes (2)
JDK-8303217 Webview loaded webpage is not showing play, volume related buttons for embeded Audio/Video elements
JDK-8303501 Unable to navigate to relative URLs after fix for JDK-8299781
JDK-8303987 Change JavaFX release version to 20.0.1 in jfx20u
JDK-8304008 Update and for jfx update repos
JDK-8304359 Create release notes for JavaFX 20
JDK-8299129 Enhance NameService lookups
JDK-8298667 Improved path handling
JDK-8298310 Enhance TLS session negotiation
JDK-8297371 Improve UTF8 representation redux
JDK-8296832 Improve Swing platform support
JDK-8296692 Improve String platform support
JDK-8296684 Improve String platform support
JDK-8296676 Improve String platform support
JDK-8295304 Runtime support improvements
JDK-8294474 Better AES support
JDK-8288436 Improve Xalan supports
JDK-8287404 Improve ping times
JDK-8301123 Enable Symbol refcounting underflow checks in PRODUCT
JDK-8303412 Update linux_x64-to-linux_aarch64 cross compilation devkit at Oracle
JDK-8278965 crash in SymbolTable::do_lookup
JDK-8301876 Crash in DumpTimeClassInfo::add_verification_constraint
JDK-8302202 Incorrect desugaring of null-allowed nested patterns
JDK-8301858 Verification error when compiling switch with record patterns
JDK-8295951 intermittent cmp_baseline task failures with CDS files
JDK-8302879 doc/ update link to jtreg builds
JDK-8245654 Add Certigna Root CA
JDK-8299194 may fail at future date
JDK-8208077 File.listRoots performance degradation
JDK-8299843 Bump version numbers for 20.0.1