{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "34"
              }
            ]
          }
        ]
      },
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0.15.0"
              },
              {
                "fixed": "0.15.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "d149636f502f5774ae1a8fb4c554b122674393b2"
            },
            {
              "fixed": "5447214643eacef71776350e779adf4b6c07bb3b"
            },
            {
              "fixed": "017137471d0043e0321e377ed8da48e45a3ec632"
            }
          ],
          "repo": "https://github.com/libass/libass",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "libass 0.15.x before 0.15.1 has a heap-based buffer overflow in decode_chars (called from decode_font and process_text) because the wrong integer data type is used for subtraction.",
  "id": "CVE-2020-36430",
  "modified": "2026-04-01T23:09:56.157932165Z",
  "published": "2021-07-20T07:15:07.817Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6JUXFQUJ32GWG5E46A63DFDCYJAF3VU6/"
    },
    {
      "type": "ADVISORY",
      "url": "https://security.gentoo.org/glsa/202208-13"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libass/OSV-2020-2099.yaml"
    },
    {
      "type": "FIX",
      "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26674"
    },
    {
      "type": "FIX",
      "url": "https://github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}