{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "3.5.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "fixed": "4fff1787408d94b895c6f9cb50f7925ad5919052"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4d35a0dbeee037c0c724a96a8e5ed9b07c31b67f"
            },
            {
              "fixed": "4fff1787408d94b895c6f9cb50f7925ad5919052"
            }
          ],
          "repo": "https://github.com/blosc/c-blosc2",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-369"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122330.json"
  },
  "details": "Blosc c-blosc2 before 3.5.0 contains a divide-by-zero vulnerability in blosc2_schunk_get_slice_buffer() in blosc/schunk.c that allows attackers to crash applications by supplying crafted frames with unchecked zero chunksize or blocksize values. Attackers can provide a malicious Blosc2 frame opened via blosc2_schunk_open() or blosc2_schunk_from_buffer() and read as a slice, raising SIGFPE and terminating the process.",
  "id": "CVE-2026-122330",
  "modified": "2026-11-05T21:16:14.186955950Z",
  "published": "2026-11-05T15:11:48.557Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://github.com/Blosc/c-blosc2"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/frame.c#L1214-L1227"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/Blosc/c-blosc2/blob/v3.4.1/blosc/schunk.c#L1662-L1700"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Blosc/c-blosc2/commit/4fff1787408d94b895c6f9cb50f7925ad5919052"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/Blosc/c-blosc2/issues/834"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122330.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://hackmd.io/@haindpwn/c-blosc2-schunk-slice-divide-by-zero"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-122330"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/blosc-c-blosc2-before-3.5.0-divide-by-zero-via-blosc2-schunk-get-slice-buffer"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Blosc c-blosc2 before 3.5.0 Divide-by-Zero via blosc2_schunk_get_slice_buffer()"
}