NULL pointer dereference in lz4-java - CVE-2026-59949
Published: July 7, 2026 / Updated: August 19, 2026
Vulnerability identifier: #VU137031
CSH Severity: Low
CVSS v4: 7.1 [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]
CVE-ID: CVE-2026-59949
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
lz4-java
How to mitigate CVE-2026-59949
Install security update from vendor's website.
lz4-java - update to 1.11.1