CVE-2026-59949: CWE-476: NULL Pointer Dereference in yawkat lz4-java
A null pointer dereference vulnerability exists in yawkat lz4-java versions prior to 1.11.1. The JNI-backed XXHash implementations do not properly validate input byte arrays and offset/length parameters, allowing null or out-of-range inputs to reach native code. This can cause the JVM to crash. The issue is fixed in version 1.11.1.
AI Analysis
Technical Summary
yawkat LZ4 Java provides LZ4 compression for Java applications. In versions before 1.11.1, the JNI-backed XXHash implementations fail to validate the byte array object and the offset and length arguments in several hashing methods (hash32(), hash64(), newStreamingHash32().update(), newStreamingHash64().update()). This allows null arrays or oversized ranges to be passed to native code, which can read outside the Java array bounds and cause a fatal JVM termination due to a NULL pointer dereference. The vulnerability is identified as CWE-476 (NULL Pointer Dereference) and has a CVSS v3.1 score of 6.5 (medium severity). The issue is resolved in version 1.11.1.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by crashing the Java Virtual Machine. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade to yawkat lz4-java version 1.11.1 or later, where the issue is fixed. No other mitigation or workaround is indicated.
CVE-2026-59949: CWE-476: NULL Pointer Dereference in yawkat lz4-java
Description
A null pointer dereference vulnerability exists in yawkat lz4-java versions prior to 1.11.1. The JNI-backed XXHash implementations do not properly validate input byte arrays and offset/length parameters, allowing null or out-of-range inputs to reach native code. This can cause the JVM to crash. The issue is fixed in version 1.11.1.
CVSS v3.1
Score 6.5medium
Affected software
pkg:maven/com.github.yawkat/lz4-javaRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
yawkat LZ4 Java provides LZ4 compression for Java applications. In versions before 1.11.1, the JNI-backed XXHash implementations fail to validate the byte array object and the offset and length arguments in several hashing methods (hash32(), hash64(), newStreamingHash32().update(), newStreamingHash64().update()). This allows null arrays or oversized ranges to be passed to native code, which can read outside the Java array bounds and cause a fatal JVM termination due to a NULL pointer dereference. The vulnerability is identified as CWE-476 (NULL Pointer Dereference) and has a CVSS v3.1 score of 6.5 (medium severity). The issue is resolved in version 1.11.1.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by crashing the Java Virtual Machine. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade to yawkat lz4-java version 1.11.1 or later, where the issue is fixed. No other mitigation or workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-07T18:49:15.607Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8474a0c6e8be03325e7d59
Added to database: 08/18/2026, 15:05:04 UTC
Last enriched: 08/18/2026, 15:20:19 UTC
Last updated: 08/18/2026, 15:48:59 UTC
Views: 5
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