{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-106451", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-06T16:49:40.591Z", "datePublished": "2026-10-06T19:50:41.915Z", "dateUpdated": "2026-10-07T18:26:06.020Z"}, "containers": {"cna": {"title": "yawkat LZ4 Java: Native library extraction to a shared temporary directory is vulnerable to file replacement by another local user", "problemTypes": [{"descriptions": [{"cweId": "CWE-367", "lang": "en", "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-377", "lang": "en", "description": "CWE-377: Insecure Temporary File", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.3, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/yawkat/lz4-java/security/advisories/GHSA-mcr4-qmvw-px4g", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/yawkat/lz4-java/security/advisories/GHSA-mcr4-qmvw-px4g"}, {"name": "https://github.com/yawkat/lz4-java/commit/7a48b7f6b8099b9dab6541e4ac2ee0979dc55aa3", "tags": ["x_refsource_MISC"], "url": "https://github.com/yawkat/lz4-java/commit/7a48b7f6b8099b9dab6541e4ac2ee0979dc55aa3"}, {"name": "https://github.com/yawkat/lz4-java/releases/tag/v1.11.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/yawkat/lz4-java/releases/tag/v1.11.4"}], "affected": [{"vendor": "yawkat", "product": "lz4-java", "versions": [{"version": "< 1.11.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-06T19:50:41.915Z"}, "descriptions": [{"lang": "en", "value": "yawkat LZ4 Java provides LZ4 compression for Java. From 1.7.0 until 1.11.4, net.jpountz.util.Native.load() uses File.createTempFile to create an exclusive temporary .lck file but derives the native-library path by removing the suffix, then FileOutputStream opens that predictable path without exclusive creation, allowing another local user with access to the same shared temporary directory to create or replace the library file before System.load() uses it. Successful exploitation depends on shared-directory permissions, host protections, and winning the race, and can execute native code as the victim; hardened systems may instead cause library loading to fail and fall back to Java implementations. Configurations using a system library, a private java.io.tmpdir, or Java-only implementations are not affected. This issue is fixed in version 1.11.4."}], "source": {"advisory": "GHSA-mcr4-qmvw-px4g", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-07T18:25:34.130789Z", "id": "CVE-2026-106451", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-07T18:26:06.020Z"}}]}}

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{"bugzilla": {"description": "org.lz4/lz4-java: lz4-java: Arbitrary code execution via insecure temporary file handling", "id": "2547137", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2547137"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-379", "details": ["A flaw was found in lz4-java. When extracting native libraries, the application writes temporary files to a shared directory using predictable file paths without exclusive file creation controls. A local attacker with access to the shared directory could exploit this race condition to replace the native library before it is loaded, potentially leading to arbitrary code execution with the privileges of the running application."], "mitigation": {"lang": "en:us", "value": "Configure affected Java applications to use a dedicated, private temporary directory rather than a world-writable directory such as /tmp.\n1. Create a directory accessible only by the service account running the Java process:\n```bash\nmkdir -p /var/run/app-private-tmp\nchmod 700 /var/run/app-private-tmp\n```\n2. Add the `java.io.tmpdir` system property to the application startup arguments or service environment:\n```\n-Djava.io.tmpdir=/var/run/app-private-tmp\n```\nCaveats:\nApplying this configuration change requires restarting the target Java application or service. Ensure that the configured directory is maintained across reboots with correct ownership and SELinux permissions."}, "name": "CVE-2026-106451", "package_state": [{"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Fix deferred", "package_name": "lz4-java", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:debezium:3", "fix_state": "Fix deferred", "package_name": "lz4-java", "product_name": "Red Hat build of Debezium 3"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "jmc", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Out of support scope", "package_name": "lz4-java", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:8", "fix_state": "Fix deferred", "package_name": "lz4-java", "product_name": "Red Hat JBoss Enterprise Application Platform 8"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Fix deferred", "package_name": "lz4-java", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-spark-operator-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th06-cpu-torch210-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th06-cuda130-torch210-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th06-rocm64-torch291-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th-torch-cpu-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-th-torch-cuda-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-10-06T19:50:41Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-106451\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-106451\nhttps://github.com/yawkat/lz4-java/commit/7a48b7f6b8099b9dab6541e4ac2ee0979dc55aa3\nhttps://github.com/yawkat/lz4-java/releases/tag/v1.11.4\nhttps://github.com/yawkat/lz4-java/security/advisories/GHSA-mcr4-qmvw-px4g"], "statement": "This vulnerability is rated as Moderate impact for Red Hat products because exploitation requires a local attacker to win a race condition during native library extraction within a shared temporary folder. An unauthorized user on the same host must predict and alter the extracted library file before the runtime dynamically loads it. In typical enterprise and containerized environments, isolated execution contexts and user-restricted temporary filesystems significantly restrict exposure to this flaw.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.11.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "lz4-java", "source": "cna", "vendor": "yawkat"}, "product": "lz4-java", "vendor": "yawkat"}], "created": "2026-10-07T00:15:06.738346+00:00", "updated": "2026-10-07T14:15:15.956391+00:00", "vendors": ["yawkat", "yawkat$PRODUCT$lz4-java"]}