Out-of-bounds read in lz4-java - #VU137032
Published: July 7, 2026
Vulnerability identifier: #VU137032
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: jpountz (Adrien Grand)
Affected software:
lz4-java
lz4-java
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information and cause a denial of service.
The vulnerability exists due to out-of-bounds read in streaming JNI-based XXHash implementations when processing an oversized length for a byte array. A remote user can pass a crafted length value to native XXHash update methods to disclose sensitive information and cause a denial of service.
The issue affects the streaming native XXHash update APIs. The non-streaming oversized-length hash case was already rejected in Java.
Remediation
Install security update from vendor's website.