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Liberica JDK20.0.1+10Release Information
Release Notes
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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 libEGL.so and libGLESv2.so 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 libbrcmEGL.so libEGL.so
sudo ln -s libbrcmGLESv2.so libGLESv2.so

CVEs

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 IDScoreComponentModuleAttack vectorComplexityPrivilegesUser interactionScopeConfidentialityIntegrityAvailability

CVE-2023-21930

7.4

security-libs

javax.net.ssl

network

high

none

none

unchanged

high

high

none

CVE-2023-21967

5.9

security-libs

javax.net.ssl

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

java.net

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

IssueDescription

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 README.md and CONTRIBUTING.md 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/building.md update link to jtreg builds

JDK-8245654

Add Certigna Root CA

JDK-8299194

CustomTzIDCheckDST.java may fail at future date

JDK-8208077

File.listRoots performance degradation

JDK-8299843

Bump version numbers for 20.0.1

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