GHSA-GWQ9-9FFJ-MVRV

Vulnerability from github – Published: 2026-10-27 15:33 – Updated: 2026-10-27 15:33
VLAI
Summary
snappy-java: Heap buffer overflow in Snappy.uncompress*Array typed-array methods
Details

Impact

Snappy.uncompressCharArray, uncompressShortArray, uncompressIntArray, uncompressLongArray, uncompressFloatArray and uncompressDoubleArray sized the result array by dividing the declared uncompressed byte length by the element size, but native code wrote the full byte length. If the declared length is not a multiple of the element size, up to 7 bytes are written past the end of the Java array, corrupting the heap.

Patches

Fixed in 1.1.10.9 (#739). These methods now reject uncompressed lengths that are not a multiple of the element size with SnappyIOException.

Workarounds

Check that Snappy.uncompressedLength(input) is a multiple of the element size before calling these methods.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.1.10.8"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.xerial.snappy:snappy-java"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.10.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-93451"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-193",
      "CWE-787"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-27T15:33:42Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\n`Snappy.uncompressCharArray`, `uncompressShortArray`, `uncompressIntArray`, `uncompressLongArray`, `uncompressFloatArray` and `uncompressDoubleArray` sized the result array by dividing the declared uncompressed byte length by the element size, but native code wrote the full byte length. If the declared length is not a multiple of the element size, up to 7 bytes are written past the end of the Java array, corrupting the heap.\n\n### Patches\nFixed in 1.1.10.9 ([#739](https://github.com/xerial/snappy-java/pull/739)). These methods now reject uncompressed lengths that are not a multiple of the element size with `SnappyIOException`.\n\n### Workarounds\nCheck that `Snappy.uncompressedLength(input)` is a multiple of the element size before calling these methods.",
  "id": "GHSA-gwq9-9ffj-mvrv",
  "modified": "2026-10-27T15:33:42Z",
  "published": "2026-10-27T15:33:42Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/xerial/snappy-java/security/advisories/GHSA-gwq9-9ffj-mvrv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93451"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xerial/snappy-java/issues/729"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xerial/snappy-java/pull/739"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xerial/snappy-java/commit/943c6043a292568575e8347af4507d015e802c75"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/xerial/snappy-java"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xerial/snappy-java/blob/v1.1.10.8/src/main/java/org/xerial/snappy/Snappy.java#L802"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xerial/snappy-java/releases/tag/v1.1.10.9"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/snappy-java-through-1.1.10.8-buffer-overflow-via-typed-uncompress-methods"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "snappy-java: Heap buffer overflow in Snappy.uncompress*Array typed-array methods"
}



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