c-blosc2 — security advisory

{
  "id": "b8c9c411af2d6b77e2e86f9b53d32d44f7e2a1e0c4b9d8e09dc4b91171208300",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-103222",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-103222",
    "summary": "A vulnerability was determined in Blosc C-Blosc2 up to 3.3.2. This impacts the function blosclz_decompress of the file blosc/blosclz.c of the component blosclz Decompression. Executing a manipulation can lead to integer overflow. The attack may be launched remotely. A high complexity level is associated with this attack. The exploitability is said to be difficult. Upgrading to version 3.3.3 will fix this issue. This patch is called fe2964d114d97847f56570a0ab2be2c57ccbeedc. The affected component should be upgraded.",
    "evidence": "osv:UBUNTU-CVE-2026-103222",
    "products": [
      {
        "name": {
          "value": "c-blosc2",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.12.0+ds-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.12.0+ds-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.13.1+ds-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.13.1+ds-1ubuntu1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.13.1+ds-1.1ubuntu1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.13.1+ds-1.1ubuntu2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "c-blosc2",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.23.0+ds-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.23.1+ds-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.23.1+ds-2",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "c-blosc2",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.17.1+ds-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.22.0+ds-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.23.0+ds-1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-103222",
      "aliases": [
        "UBUNTU-CVE-2026-103222"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "c-blosc2",
            "purl": "pkg:deb/ubuntu/c-blosc2?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "2.12.0+ds-1",
            "2.12.0+ds-2",
            "2.13.1+ds-1",
            "2.13.1+ds-1ubuntu1",
            "2.13.1+ds-1.1ubuntu1",
            "2.13.1+ds-1.1ubuntu2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103222.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libblosc2-2t64",
                "binary_version": "2.13.1+ds-1.1ubuntu2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "c-blosc2",
            "purl": "pkg:deb/ubuntu/c-blosc2?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "2.23.0+ds-1",
            "2.23.1+ds-1",
            "2.23.1+ds-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103222.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libblosc2-7",
                "binary_version": "2.23.1+ds-2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "c-blosc2",
            "purl": "pkg:deb/ubuntu/c-blosc2?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "2.17.1+ds-2",
            "2.22.0+ds-1",
            "2.23.0+ds-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103222.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libblosc2-7",
                "binary_version": "2.23.0+ds-1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:57:57.924989020Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-103222"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-103222",
        "https://www.cve.org/CVERecord?id=CVE-2026-103222",
        "https://github.com/Blosc/c-blosc2/",
        "https://github.com/Blosc/c-blosc2/commit/fe2964d114d97847f56570a0ab2be2c57ccbeedc",
        "https://github.com/Blosc/c-blosc2/releases/tag/v3.3.3",
        "https://vuldb.com/cve/CVE-2026-103222",
        "https://vuldb.com/submit/954976",
        "https://vuldb.com/vuln/411905",
        "https://vuldb.com/vuln/411905/cti"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-103222",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/1/score"
  },
  "source_id": "core-osv",
  "document_id": 357790,
  "published_at": "2026-09-30T15:22:00+00:00"
}