FKIE_CVE-2026-103635

Vulnerability from fkie_nvd - Published: 2026-10-10 11:17 - Updated: 2026-10-10 13:17
Severity
Summary
Out-of-bounds read in the compact Theta sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp). compact_theta_sketch::deserialize() and wrapped_compact_theta_sketch::wrap() read header fields before checking that the input was long enough. For the compressed format, the size check could be defeated by a 32-bit overflow, and two header fields that control decoding were not validated; this also affected deserialization from a stream. A crafted or truncated sketch could cause a read past the end of the input. In the compressed case the over-read can be large, and the bytes read can become part of the deserialized sketch. This can cause a crash (denial of service) and could expose adjacent memory contents. This issue affects Apache DataSketches C++: from 3.1.0 before 5.3.0. Only applications that deserialize Theta sketches from untrusted sources are affected. Users are recommended to upgrade to version 5.3.0, which fixes this issue.
References
security@apache.orghttps://github.com/apache/datasketches-cpp/releases/tag/5.3.0
security@apache.orghttps://lists.apache.org/thread/15b86y9jstco39kzppjw7l5kvhjvwqvv
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/10/10/5
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "packageName": "apache/datasketches-cpp",
          "packageURL": "pkg:github/apache/datasketches-cpp",
          "product": "Apache DataSketches",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "5.2.0",
              "status": "affected",
              "version": "3.1.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Out-of-bounds read in the compact Theta sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp).\n\ncompact_theta_sketch::deserialize() and wrapped_compact_theta_sketch::wrap() read header fields before checking that the input was long enough. For the compressed format, the size check could be defeated by a 32-bit overflow, and two header fields that control decoding were not validated; this also affected deserialization from a stream. A crafted or truncated sketch could cause a read past the end of the input. In the compressed case the over-read can be large, and the bytes read can become part of the deserialized sketch. This can cause a crash (denial of service) and could expose adjacent memory contents.\n\nThis issue affects Apache DataSketches C++: from 3.1.0 before 5.3.0. Only applications that deserialize Theta sketches from untrusted sources are affected.\n\nUsers are recommended to upgrade to version 5.3.0, which fixes this issue."
    }
  ],
  "id": "CVE-2026-103635",
  "lastModified": "2026-10-10T13:17:31.060",
  "metrics": {},
  "published": "2026-10-10T11:17:35.963",
  "references": [
    {
      "source": "security@apache.org",
      "url": "https://github.com/apache/datasketches-cpp/releases/tag/5.3.0"
    },
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread/15b86y9jstco39kzppjw7l5kvhjvwqvv"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2026/10/10/5"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        },
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ],
      "source": "security@apache.org",
      "type": "Secondary"
    }
  ]
}



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