CVE-2024-3933: Eclipse Open J9 With -Xgc:concurrentScavenge on IBM Z, could write/read outside of a buffer

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-27 · updated 2026-06-17
Weakness: CWE-125

Description

In Eclipse OpenJ9 release versions prior to 0.44.0 and after 0.13.0, when running with JVM option -Xgc:concurrentScavenge, the sequence generated for System.arrayCopy on the IBM Z platform with hardware and software support for guarded storage [1], could allow access to a buffer with an incorrect length value when executing an arraycopy sequence while the Concurrent Scavenge Garbage Collection cycle is active and the source and destination memory regions for arraycopy overlap. This allows read and write to addresses beyond the end of the array range.

Affected products

The Eclipse Foundation Eclipse OpenJ9: from 0.13.0 before 0.44.0 — fixed in 0.44.0

How to fix

Upgrade to a fixed version: The Eclipse Foundation Eclipse OpenJ9 0.44.0. Check the vendor advisory for mitigations.

References

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