{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-87825", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-09T10:32:34.110Z", "datePublished": "2026-09-09T14:32:44.795Z", "dateUpdated": "2026-09-09T14:32:44.795Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-09T14:32:44.795Z"}, "datePublic": "2026-08-19T00:00:00.000Z", "title": "zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compression and Decompression Dictionaries", "descriptions": [{"lang": "en", "value": "zstd-jni before 1.5.7-14 contains a use-after-free vulnerability where streams and contexts hold a dictionary's shared lock only during the load call, allowing the dictionary to be closed while still referenced. Attackers can close a dictionary after associating it with a stream or context, causing subsequent read or write operations to access freed native memory, resulting in silent data corruption or JVM crashes."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Use After Free", "cweId": "CWE-416", "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": "1.3.8-4", "lessThan": "1.5.7-14", "status": "affected", "versionType": "custom"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/luben/zstd-jni/security/advisories/GHSA-947w-pxjj-c7m9", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-947w-pxjj-c7m9)"}, {"url": "https://github.com/luben/zstd-jni/commit/393d7311766abbc285b149302c0fe1f94b16d555", "tags": ["patch"], "name": "Fix commit: hold the dictionary shared lock for the stream's usage window"}, {"url": "https://github.com/luben/zstd-jni/commit/a560131d7834598afd9cea6b7c107bc88e915936", "tags": ["patch"], "name": "Fix commit: cross-object lifetime tracking for dictionaries and contexts"}, {"url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java", "tags": ["technical-description"], "name": "Shared lock released as soon as the dictionary is loaded at v1.5.7-13"}, {"url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/BaseZstdBufferDecompressingStreamNoFinalizer.java", "tags": ["technical-description"], "name": "Same lock lifecycle in the buffer stream base class 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/0827ed02551bbd8d6f8e4bbff99d83bf50f91938", "tags": ["technical-description", "patch"], "name": "Commit that made setDict load the dictionary eagerly into the native context (first released in 1.3.8-4)"}, {"url": "https://github.com/luben/zstd-jni", "tags": ["product"]}, {"name": "VulnCheck Advisory: zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compression and Decompression Dictionaries", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/zstd-jni-1.3.8-4-through-1.5.7-13-use-after-free-of-compression-and-decompression-dictionaries"}], "credits": [{"lang": "en", "value": "Yu Bao, PayPal Cyber Security Team", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}, "source": {"discovery": "EXTERNAL"}}}}

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