NULL pointer dereference in yawkat lz4-java
Priority LOW 29CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- Low · None · High
- Fix status
- Partial Red Hat: 2 fixed, 12 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-476.
Summary
yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.1, JNI-backed XXHash implementations fail to validate the byte array object and the off and len arguments in XXHashFactory.nativeInstance().hash32().hash(), XXHashFactory.nativeInstance().hash64().hash(), XXHashFactory.nativeInstance().newStreamingHash32().update(), and XXHashFactory.nativeInstance().newStreamingHash64().update(), allowing null arrays or oversized ranges to reach native code, read outside the Java array, and fatally terminate the JVM. This issue is fixed in version 1.11.1.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00466 40th percentileScored 2026-11-07
Fix Partial lz4-java (yawkat): 1.11.1at.yawk.lz4:lz4-java (Maven): 1.11.1Red Hat: 2 advisoriesRed Hat: 2 fixed, 12 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| yawkat | lz4-java | before 1.11.1 | 1.11.1 | Patch available | CNA |
| — | at.yawk.lz4:lz4-java (Maven) | before 1.11.1 | 1.11.1 | Patch available | GHSA-xx22-p4ch-683r |
| — | org.lz4:lz4-java (Maven) | up to 1.8.1 | — | No fix listed | GHSA-xx22-p4ch-683r |
- lz4-java Vendoryawkat Affected before 1.11.1 Fixed in 1.11.1 Patch available CNA
- at.yawk.lz4:lz4-java (Maven) Vendor— Affected before 1.11.1 Fixed in 1.11.1 Patch available GHSA-xx22-p4ch-683r
- org.lz4:lz4-java (Maven) Vendor— Affected up to 1.8.1 Fixed in — No fix listed GHSA-xx22-p4ch-683r
Remediation
- Fix · CNA lz4-java (yawkat) Fixed in 1.11.1
- Fix · GHSA-xx22-p4ch-683r at.yawk.lz4:lz4-java (Maven) Fixed in 1.11.1 Advisory →
Red Hat 2 advisories
- RHSA-2026:83520 Released 2026-10-15 · Red Hat rating ImportantRed Hat build of Quarkus 3.33.4 release and security update
- Red Hat build of Quarkus 3.33.4.redhat at.yawk.lz4.lz4-java-1.11.1.rhel8-redhat-00001.jar, com.fasterxml.jackson.core.jackson-core-2.21.7.redhat-00001.jar, com.fasterxml.jackson.core.jackson-databind-2.21.7.redhat-00001.jar +10
- RHSA-2026:83082 Released 2026-10-15 · Red Hat rating ImportantRed Hat build of Quarkus 3.27.6 release and security update
- Red Hat build of Quarkus 3.27.6.redhat at.yawk.lz4.lz4-java-1.11.1.rhel8-redhat-00001.jar, com.fasterxml.jackson.core.jackson-core-2.21.7.redhat-00001.jar, com.fasterxml.jackson.core.jackson-databind-2.21.7.redhat-00001.jar +11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Developer Tools and Services | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat Fuse 7 | Affected | No fix yet: Fix deferred |
| Red Hat Hardened Images | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Enterprise Application Platform 8 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat build of Apache Camel 4 for Quarkus 3 | Affected | No fix yet: Fix deferred |
| Red Hat build of Apache Camel for Spring Boot 4 | Affected | No fix yet: Fix deferred |
| Red Hat build of Apicurio Registry 3 | Affected | No fix yet: Fix deferred |
| Red Hat build of Debezium 3 | Affected | No fix yet: Fix deferred |
| Red Hat build of Quarkus 3.27.6.redhat | Fixed | RHSA-2026:83082 |
| Red Hat build of Quarkus 3.33.4.redhat | Fixed | RHSA-2026:83520 |
Not affected: 2 products
- Red Hat build of Quarkus 3.27.6.redhat
- Red Hat build of Quarkus 3.33.4.redhat
Timeline
- 2026-10-02 Threatist record created from CVE-2026-59949
- 2026-10-03 Alias added: GHSA-xx22-p4ch-683r
- 2026-10-16 Fix available: RHSA-2026:83520 · Red Hat
- 2026-10-16 Fix available: RHSA-2026:83082 · Red Hat
- 2026-10-16 Fix available: Red Hat build of Quarkus 3.27.6.redhat, Red Hat build of Quarkus 3.33.4.redhat · Red Hat
References
More yawkat vulnerabilities
- TI-2025-40977 yawkat LZ4 Java has a possible information leak in Java safe decompressor CVSS 4.0HIGH 8.2
- TI-2026-68931 LZ4 Java native library extraction allows local file replacement CVSS 4.0HIGH 7.3
- TI-2026-68933 LZ4 Java decompressor allocates memory from untrusted length header CVSS 3.1MEDIUM 5.3
- TI-2026-68932 Excessive memory allocation in LZ4 Java stream reader CVSS 3.1MEDIUM 5.3
- TI-2026-68930 LZ4 Java LZ4FrameInputStream allocates memory without limits CVSS 3.1MEDIUM 5.3
- TI-2026-68929 Uncontrolled recursion in yawkat LZ4 Java LZ4BlockInputStream CVSS 3.1LOW 3.7
Sources
- CVE-2026-59949 · CVE Program
- CVE-2026-59949 · NVD
- FIRST EPSS
- GHSA-xx22-p4ch-683r · GitHub Advisory Database · CC BY 4.0
- CVE-2026-59949 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences