NULL pointer dereference in lz4-java - #VU137031
Published: July 7, 2026
Vulnerability identifier: #VU137031
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-476
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 cause a denial of service.
The vulnerability exists due to null pointer dereference in JNI-based XXHash implementations when processing a null byte array reference with a zero-length range. A remote user can pass a null array reference to native XXHash methods to cause a denial of service.
This affects the native XXHash hash and streaming update APIs, while Java-based XXHash implementations are not affected.
Remediation
Install security update from vendor's website.