CVE-2026-87825 (GCVE-0-2026-87825)

Vulnerability from cvelistv5 – Published: 2026-09-09 14:32 – Updated: 2026-09-14 13:35
VLAI
Title
zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compression and Decompression Dictionaries
Summary
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.
Severity
7 (High)
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
7.7 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 13:34 UTC
CWE
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6929 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
luben zstd-jni Affected: 1.3.8-4 , < 1.5.7-14 (custom)
guessed Create a notification for this product.
Date Public
2026-08-19 00:00
Credits
Yu Bao, PayPal Cyber Security Team
Show details on NVD website
To clipboard 

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              "name": "Commit that made setDict load the dictionary eagerly into the native context (first released in 1.3.8-4)",
              "tags": [
                "technical-description",
                "patch"
              ],
              "url": "https://github.com/luben/zstd-jni/commit/0827ed02551bbd8d6f8e4bbff99d83bf50f91938"
            },
            {
              "tags": [
                "product"
              ],
              "url": "https://github.com/luben/zstd-jni"
            },
            {
              "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"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compression and Decompression Dictionaries",
          "x_generator": {
            "engine": "vulncheck-endgame"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2026-87825",
        "datePublished": "2026-09-09T14:32:44.795Z",
        "dateReserved": "2026-09-09T10:32:34.110Z",
        "dateUpdated": "2026-09-14T13:35:21.082Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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