Java™ SE Development Kit 8, Update 511 Enterprise Performance Pack (JDK 8u511-PERF)

Release date: October 20, 2026

The full version string for this update release is 1.8.0_511-perf-b11 (where "b" means "build"). The version number is 1.8.0_511-perf.

 

IANA TZ Data 2026c

JDK 8u511 contains IANA time zone data 2026c which contains the following changes since the previous update.

• Alberta moved to permanent -06 on 2026-06-18.
• Morocco moves to permanent +00 on 2026-09-20.

For more information, refer to Timezone Data Versions in the JRE Software.

 

Security Baselines

The security baselines for the Java Runtime at the time of the release of JDK 8u511 are specified in the following table:

 

Keeping the JDK up to Date

Oracle recommends that the JDK is updated with each Critical Patch Update. In order to determine if a release is the latest, the Security Baseline page can be used to determine which is the latest version for each release family.

Critical patch updates, which contain security vulnerability fixes, are announced one year in advance on Critical Patch Updates, Security Alerts and Bulletins. It is not recommended that this JDK (version 8u511) be used after the next Critical Security Patch Update scheduled for November 17, 2026. Oracle is transitioning to more frequent security updates, see the recently published blog for more information.

Java Management Service, available to all users, can help you find vulnerable Java versions in your systems. Java SE Subscribers and customers running in Oracle Cloud can use Java Management Service to update Java Runtimes and to do further security reviews like identifying potentially vulnerable third party libraries used by your Java programs. Existing Java Management Service user click here to log in to your dashboard. The Java Management Service Documentation provides a list of features available to everyone and those available only to customers. Learn more about using Java Management Service to monitor and secure your Java Installations.

For systems unable to reach the Oracle Servers, a secondary mechanism expires this JRE (version 8u511) on 2027-02-19. After either condition is met (new release becoming available or expiration date reached), the JRE will provide additional warnings and reminders to users to update to the newer version. For more information, see 23.1.2 JRE Expiration Date in the Java Platform, Standard Edition Deployment Guide.

 

Changes in Java SE 8u511-Perf

In addition to the applicable changes in JDK 8u511 , JDK 8u511 Enterprise Performance Pack includes the following changes from JDK 17.

 

Other Notes

 

Bug Fixes

JDK 8u511 Enterprise Performance Pack includes the following fixes from JDK 17:

#	BugId	Component	Summary
1	JDK-8336702	hotspot/compiler	C2 compilation fails with "all memory state should have been processed" assert
2	JDK-8349721	hotspot/compiler	Add aarch64 intrinsics for ML-KEM
3	JDK-8354926	hotspot/compiler	Remove remnants of debugging in the fix for JDK-8348561 and JDK-8349721
4	JDK-8341527	hotspot/compiler	AVX-512 intrinsic for SHA3
5	JDK-8348561	hotspot/compiler	Add aarch64 intrinsics for ML-DSA
6	JDK-8386578	hotspot/compiler	double_keccak stub does not set its return value on x86
7	JDK-8293114	hotspot/gc	JVM should trim the native heap
8	JDK-8296796	hotspot/runtime	Provide clean, platform-agnostic interface to C-heap trimming
9	JDK-8273153	hotspot/runtime	Consolidate file_exists into os:file_exists
10	JDK-8354057	hotspot/runtime	Odd debug output in -Xlog:os+container=debug on certain systems
11	JDK-8354878	hotspot/runtime	File Leak in CgroupSubsystemFactory::determine_type of cgroupSubsystem_linux.cpp:300
12	JDK-8364106	hotspot/runtime	Include java.runtime.version in thread dump output
13	JDK-8375125	hotspot/runtime	assert(false) failed: "Attempting to acquire lock NativeHeapTrimmer_lock/nosafepoint out of order with lock ConcurrentHashTableResize_lock/nosafepoint-2 -- possible deadlock" when using native heap trimmer
14	JDK-8261242	hotspot/runtime	[Linux] OSContainer::is_containerized() returns true when run outside a container
15	JDK-8343599	hotspot/runtime	Kmem limit and max values swapped when printing container information
16	JDK-8322420	hotspot/runtime	[Linux] cgroup v2: Limits in parent nested control groups are not detected
17	JDK-8331560	hotspot/runtime	Refactor Hotspot container detection code so that subsystem delegates to controllers
18	JDK-8302744	hotspot/runtime	Refactor Hotspot container detection code
19	JDK-8341644	hotspot/runtime	Compile error in cgroup coding when using toolchain clang
20	JDK-8347129	hotspot/runtime	cpuset cgroups controller is required for no good reason
21	JDK-8347811	hotspot/runtime	Container detection code for cgroups v2 should use cgroup.controllers
22	JDK-8349988	hotspot/runtime	Change cgroup version detection logic to not depend on /proc/cgroups
23	JDK-8343191	hotspot/runtime	Cgroup v1 subsystem fails to set subsystem path