The vulnerabilities of the functions setDict(), setLongMax(), and setLevel() in the data compression library zstd-jni allow a attacker to cause a service failure.

The vulnerabilities of the functions setDict, setLongMax, and setLevel in the data compression library zstd-jni are related to the possibility of exploiting memory usage after deallocation. Exploiting these vulnerabilities could allow an attacker to cause a service failure...

CVE-2026-87877

zstd-jni versions before 1.5.7-14 fail to validate closed state in setDict, setLongMax, setLevel and setRefMultipleDDicts methods of stream classes. Attackers can call these methods on closed streams to write through freed native pointers, corrupting unrelated objects or crashing the JVM...

CVE-2026-87877: Use After Free

zstd-jni versions before 1.5.7-14 fail to validate closed state in setDict, setLongMax, setLevel and setRefMultipleDDicts methods of stream classes. Attackers can call these methods on closed streams to write through freed native pointers, corrupting unrelated objects or crashing the JVM...