{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-87824", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-09T10:32:34.110Z", "datePublished": "2026-09-09T14:32:44.099Z", "dateUpdated": "2026-09-09T14:32:44.099Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-09T14:32:44.099Z"}, "datePublic": "2026-08-19T00:00:00.000Z", "title": "zstd-jni 1.3.3-1 through 1.5.7-13 Out-of-Bounds Read via Zstd.trainFromBufferDirect", "descriptions": [{"lang": "en", "value": "zstd-jni before 1.5.7-14 fails to validate the samples buffer capacity in Zstd.trainFromBufferDirect, allowing attackers to read past buffer boundaries by supplying oversized per-sample lengths. Attackers can trigger out-of-bounds memory access by providing crafted sample length arrays that cause the native implementation to walk past the buffer allocation, resulting in JVM termination."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Out-of-bounds Read", "cweId": "CWE-125", "type": "CWE"}]}], "affected": [{"vendor": "luben", "product": "zstd-jni", "collectionURL": "https://repo1.maven.org/maven2/com/github/luben/zstd-jni/", "repo": "https://github.com/luben/zstd-jni", "defaultStatus": "unaffected", "packageURL": "pkg:maven/com.github.luben/zstd-jni", "versions": [{"version": "1.3.3-1", "lessThan": "1.5.7-14", "status": "affected", "versionType": "custom"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/luben/zstd-jni/security/advisories/GHSA-257p-3h6w-pg7h", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-257p-3h6w-pg7h)"}, {"url": "https://github.com/luben/zstd-jni/commit/bba6cfca2c0897f1fa004f4193247479f10da853", "tags": ["patch"], "name": "Fix commit: validate the samples buffer capacity against the declared sample sizes"}, {"url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/native/jni_zdict.c", "tags": ["technical-description"], "name": "Samples buffer capacity never read at v1.5.7-13"}, {"url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/Zstd.java", "tags": ["technical-description"], "name": "Java wrapper that only checks the sample count at v1.5.7-13"}, {"url": "https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14", "tags": ["release-notes"], "name": "zstd-jni v1.5.7-14 Release Notes"}, {"url": "https://github.com/luben/zstd-jni/commit/53d3c6342883f7d6717b2477a7f9c1b4a4a56980", "tags": ["technical-description", "patch"], "name": "Commit that introduced the direct-buffer dictionary trainer without a samples capacity check (first released in 1.3.3-1)"}, {"url": "https://github.com/luben/zstd-jni", "tags": ["product"]}, {"name": "VulnCheck Advisory: zstd-jni 1.3.3-1 through 1.5.7-13 Out-of-Bounds Read via Zstd.trainFromBufferDirect", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/zstd-jni-1.3.3-1-through-1.5.7-13-out-of-bounds-read-via-zstd-trainfrombufferdirect"}], "credits": [{"lang": "en", "value": "Yu Bao, PayPal Cyber Security Team", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}, "source": {"discovery": "EXTERNAL"}}}}

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