Eclipse OpenJ9 <=0.60 Buffer Underflow via -Xtrace Args
CVE-2026-16439 Published on July 21, 2026
Eclipse OpenJ9 : Using -Xtrace to trace method arguments can lead to buffer underflow
In Eclipse OpenJ9 versions up to 0.60, using -Xtrace to trace method arguments can lead to buffer underflow.
Vulnerability Analysis
CVE-2026-16439 can be exploited with network access. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a buffer underrun Vulnerability?
The software writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer. This typically occurs when a pointer or its index is decremented to a position before the buffer, when pointer arithmetic results in a position before the beginning of the valid memory location, or when a negative index is used.
CVE-2026-16439 has been classified to as a buffer underrun vulnerability or weakness.
Products Associated with CVE-2026-16439
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Affected Versions
Eclipse Foundation OpenJ9:- Version 0.8.0 and below 0.60.0 is affected.
- Before 0.8.0 is unaffected.
- Version 0.60.0 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.