Liberica JDK 20.0.2+10 Release Notes

The full version string for this update release is 20.0.2+10. The version number is 20.

Liberica JDK 20.0.2+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 20.0.2 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-2023-22043 5.9 javafx graphics network high none none unchanged none high none
CVE-2023-22041 5.1 hotspot compiler local high none none unchanged high none none
CVE-2023-25193 3.7 client-libs 2d network high none none unchanged none none low
CVE-2023-22044 3.7 hotspot compiler network high none none unchanged low none none
CVE-2023-22045 3.7 hotspot compiler network high none none unchanged low none none
CVE-2023-22049 3.7 core-libs network high none none unchanged none low none
CVE-2023-22036 3.7 core-libs java.util network high none none unchanged none none low
CVE-2023-22006 3.1 core-libs network high none required unchanged none low none

Issues fixed

Issue Description
JDK-8282359 Intermittent WebKit build failure on Windows: C1090: PDB API call failed, error code 23
JDK-8286089 Intermittent WebKit build failure on macOS in JavaScriptCore
JDK-8301009 Update libxml2 to 2.10.3
JDK-8304751 Improve pipeline layout
JDK-8305108 Change JavaFX release version to 20.0.2 in jfx20u
JDK-8306115 Update libxml2 to 2.10.4
JDK-8306450 Create release notes for JavaFX 20.0.1
JDK-8308682 Enhance AES performance
JDK-8305312 Enhanced path handling
JDK-8304468 Better array usages
JDK-8304460 Improve array usages
JDK-8303376 Better launching of JDI
JDK-8302483 Enhance ZIP performance
JDK-8302475 Enhance HTTP client file downloading
JDK-8300596 Enhance Jar Signature validation
JDK-8300285 Enhance TLS data handling
JDK-8298676 Enhanced Look and Feel
JDK-8296565 Enhanced archival support
JDK-8294323 Improve Shared Class Data
JDK-8304878 ConcurrentModificationException in javadoc tool
JDK-8305668 PPC: Non-Top Interpreted frames should be independent of ABI_ELFv2
JDK-8307346 Add missing gc+phases logging for ObjectCount(AfterGC) JFR event collection code
JDK-8307104 [AIX] VM crashes with UseRTMLocking on Power10
JDK-8307425 Socket input stream read burns CPU cycles with back-to-back poll(0) calls
JDK-8304350 Font.getStringBounds calculates wrong width for TextAttribute.TRACKING other than 0.0
JDK-8307378 Allow collectors to provide specific values for GC notifications' actions
JDK-8307466 java.time.Instant calculation bug in until and between methods
JDK-8307134 Add GTS root CAs
JDK-8289735 UTIL_LOOKUP_PROGS fails on pathes with space
JDK-8306976 UTIL_REQUIRE_SPECIAL warning on grep
JDK-8306825 Monitor deflation might be accidentally disabled by zero intervals
JDK-8304295 harfbuzz build fails with GCC 7 after JDK-8301998
JDK-8304760 Add 2 Microsoft TLS roots
JDK-8305975 Add TWCA Global Root CA
JDK-8306774 Make runtime/Monitor/ more reliable
JDK-8305994 Guarantee eventual async monitor deflation
JDK-8301190 [vectorapi] The typeChar of LaneType is incorrect when default locale is tr
JDK-8306883 Thread stacksize is reported with wrong units in os::create_thread logging
JDK-8306734 Shenandoah: Missing barriers on deoptimization path
JDK-8306658 GHA: MSVC installation could be optional since it might already be pre-installed
JDK-8305403 Shenandoah evacuation workers may deadlock
JDK-8305352 updateIconImages may lead to deadlock after JDK-8276849
JDK-8304291 [AIX] Broken build after JDK-8301998
JDK-8306543 GHA: MSVC installation is failing
JDK-8297587 Upgrade JLine to 3.22.0
JDK-8304498 JShell does not switch to raw mode when there is no /bin/test
JDK-8298887 On the latest macOS+XCode the Robot API may report wrong colors
JDK-8302491 NoClassDefFoundError omits the original cause of an error
JDK-8302191 Performance degradation for float/double modulo on Linux
JDK-8296412 Special case infinite loops with unmerged backedges in IdealLoopTree::check_safepts
JDK-8305113 (tz) Update Timezone Data to 2023c
JDK-8305766 ProblemList runtime/CompressedOops/
JDK-8296318 use-def assert: special case undetected loops nested in infinite loops
JDK-8298568 Fastdebug build fails after JDK-8296389
JDK-8303069 Memory leak in CompilerOracle::parse_from_line
JDK-8201516 DebugNonSafepoints generates incorrect information
JDK-8303564 C2: "Bad graph detected in build_loop_late" after a CMove is wrongly split thru phi
JDK-8301338 Identical branch conditions in CompileBroker::print_heapinfo
JDK-8299570 [JVMCI] Insufficient error handling when CodeBuffer is exhausted
JDK-8303508 Vector.lane() gets wrong value on x86
JDK-8304683 Memory leak in WB_IsMethodCompatible
JDK-8303511 C2: assert(get_ctrl(n) == cle_out) during unrolling
JDK-8301491 C2: java.lang.StringUTF16::indexOfChar intrinsic called with negative character argument
JDK-8290822 C2: assert in PhaseIdealLoop::do_unroll() is subject to undefined behavior
JDK-8300590 [JVMCI] BytecodeFrame.equals is broken
JDK-8289748 C2 compiled code crashes with SIGFPE with -XX:+StressLCM and -XX:+StressGCM
JDK-8299959 C2: CmpU::Value must filter overflow computation against local sub computation
JDK-8300079 SIGSEGV in LibraryCallKit::inline_string_copy due to constant NULL src argument
JDK-8302595 use-after-free related to GraphKit::clone_map
JDK-8302594 use-after-free in Node::destruct
JDK-8297730 C2: Arraycopy intrinsic throws incorrect exception
JDK-8302172 [JVMCI] HotSpotResolvedJavaMethodImpl.canBeInlined must respect ForceInline
JDK-8300823 UB: Compile::_phase_optimize_finished is initialized too late
JDK-8296389 C2: PhaseCFG::convert_NeverBranch_to_Goto must handle both orders of successors
JDK-8299259 C2: Div/Mod nodes without zero check could be split through iv phi of loop resulting in SIGFPE
JDK-8299179 ArrayFill with store on backedge needs to reduce length by 1
JDK-8304871 Use default visibility for static library builds
JDK-8304671 javac regression: Compilation with --release 8 fails on underscore in enum identifiers
JDK-8303102 jcmd: ManagementAgent.status truncates the text longer than O_BUFLEN
JDK-8227257 javax/swing/JFileChooser/4847375/ fails with AssertionError
JDK-8302976 C2 intrinsification of Float.floatToFloat16 and Float.float16ToFloat yields different result than the interpreter
JDK-8301998 Update HarfBuzz to 7.0.1
JDK-8300692 GCC 12 reports some compiler warnings in bundled freetype
JDK-8303937 Corrupted heap dumps due to missing retries for os::write()
JDK-8303440 The "ZonedDateTime.parse" may not accept the "UTC+XX" zone id
JDK-8282201 Consider removal of expiry check in test
JDK-8303186 Missing Classpath exception from Continuation.c
JDK-8303906 Update jdk20u fix version to 20.0.2