libchdr — security advisory

{
  "id": "12b5349d1794f79c6a26d76635582792544562d41436dd83d8183940eec40142",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-32836",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-32836",
    "summary": "dr_libs dr_flac.h version 0.13.3 and earlier (fixed in commits fefced4, 4f5a4cd, and 663239a) contain an uncontrolled memory allocation vulnerability in drflac__read_and_decode_metadata() that allows attackers to trigger excessive memory allocation by supplying crafted PICTURE metadata blocks. Attackers can exploit attacker-controlled mimeLength and descriptionLength fields to cause denial of service through memory exhaustion when processing FLAC streams with metadata callbacks.",
    "evidence": "osv:UBUNTU-CVE-2026-32836",
    "products": [
      {
        "name": {
          "value": "libchdr",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.0~git20230918.9108f34+dfsg-2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "libchdr",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.0~git20240929.aaca599+dfsg-1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "libchdr",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.0~git20250608.8bba774+dfsg-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.3.0+dfsg-1",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "libchdr",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.0~git20240929.aaca599+dfsg-1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "0.0~git20250608.8bba774+dfsg-1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "0.0~git20250608.8bba774+dfsg-2",
            "evidence": "/affected/3/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-32836",
      "aliases": [
        "UBUNTU-CVE-2026-32836"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        },
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "libchdr",
            "purl": "pkg:deb/ubuntu/libchdr?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "0.0~git20230918.9108f34+dfsg-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32836.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libchdr0",
                "binary_version": "0.0~git20230918.9108f34+dfsg-2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "libchdr",
            "purl": "pkg:deb/ubuntu/libchdr?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "0.0~git20240929.aaca599+dfsg-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32836.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libchdr0",
                "binary_version": "0.0~git20240929.aaca599+dfsg-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "libchdr",
            "purl": "pkg:deb/ubuntu/libchdr?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "0.0~git20250608.8bba774+dfsg-2",
            "0.3.0+dfsg-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32836.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libchdr0",
                "binary_version": "0.3.0+dfsg-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "libchdr",
            "purl": "pkg:deb/ubuntu/libchdr?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "0.0~git20240929.aaca599+dfsg-1",
            "0.0~git20250608.8bba774+dfsg-1",
            "0.0~git20250608.8bba774+dfsg-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32836.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libchdr0",
                "binary_version": "0.0~git20250608.8bba774+dfsg-2"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:59:58.706665488Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-32836"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-32836",
        "https://www.cve.org/CVERecord?id=CVE-2026-32836",
        "https://github.com/mackron/dr_libs/issues/298",
        "https://github.com/mackron/dr_libs/commit/663239a3d0460c33bd5b6e5166edcb404e3df676",
        "https://github.com/mackron/dr_libs/commit/fefced4a64adfb1a68a2d31d882366e56096dee8",
        "https://github.com/mackron/dr_libs/commit/4f5a4cd3b57564d969443c580c75857e039f100a"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-32836",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/2/score"
  },
  "source_id": "core-osv",
  "document_id": 360056,
  "published_at": "2026-03-17T20:16:00+00:00"
}