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    4 vulnerabilities found for theora by xiph

    CVE-2026-5673 (GCVE-0-2026-5673)

    Vulnerability from nvd – Published: 2026-04-06 09:22 – Updated: 2026-05-01 20:03
    VLAI
    Title
    Libtheora: libtheora: denial of service or information disclosure via malformed avi file processing
    Summary
    A flaw was found in libtheora. This heap-based out-of-bounds read vulnerability exists within the AVI (Audio Video Interleave) parser, specifically in the avi_parse_input_file() function. A local attacker could exploit this by tricking a user into opening a specially crafted AVI file containing a truncated header sub-chunk. This could lead to a denial-of-service (application crash) or potentially leak sensitive information from the heap.
    Severity
    5.6 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Date Public
    2026-04-06 09:16
    Credits
    Red Hat would like to thank ChenZhengzhe (HangZhouDianZi University) for reporting this issue.
    Show details on NVD website
    To clipboard 

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    CVE-2024-56431 (GCVE-0-2024-56431)

    Vulnerability from nvd – Published: 2024-12-25 00:00 – Updated: 2025-05-07 19:45 Disputed
    VLAI
    Summary
    oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift. NOTE: this is disputed by third parties because there is no evidence of a security impact, e.g., an application would not crash.
    Severity
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • n/a
    • CWE-863 - Incorrect Authorization
    Assigner
    References
    Show details on NVD website
    To clipboard 

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    CVE-2026-5673 (GCVE-0-2026-5673)

    Vulnerability from cvelistv5 – Published: 2026-04-06 09:22 – Updated: 2026-05-01 20:03
    VLAI
    Title
    Libtheora: libtheora: denial of service or information disclosure via malformed avi file processing
    Summary
    A flaw was found in libtheora. This heap-based out-of-bounds read vulnerability exists within the AVI (Audio Video Interleave) parser, specifically in the avi_parse_input_file() function. A local attacker could exploit this by tricking a user into opening a specially crafted AVI file containing a truncated header sub-chunk. This could lead to a denial-of-service (application crash) or potentially leak sensitive information from the heap.
    Severity
    5.6 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Date Public
    2026-04-06 09:16
    Credits
    Red Hat would like to thank ChenZhengzhe (HangZhouDianZi University) for reporting this issue.
    Show details on NVD website
    To clipboard 

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    CVE-2024-56431 (GCVE-0-2024-56431)

    Vulnerability from cvelistv5 – Published: 2024-12-25 00:00 – Updated: 2025-05-07 19:45 Disputed
    VLAI
    Summary
    oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift. NOTE: this is disputed by third parties because there is no evidence of a security impact, e.g., an application would not crash.
    Severity
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • n/a
    • CWE-863 - Incorrect Authorization
    Assigner
    References
    Show details on NVD website
    To clipboard 

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          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift. NOTE: this is disputed by third parties because there is no evidence of a security impact, e.g., an application would not crash."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-04-25T18:56:36.797Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/xiph/theora/issues/17#issuecomment-2480630603"
        },
        {
          "url": "https://github.com/xiph/theora/blob/7180717276af1ebc7da15c83162d6c5d6203aabf/lib/huffdec.c#L193"
        },
        {
          "url": "https://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoC"
        },
        {
          "url": "https://www.openwall.com/lists/oss-security/2025/04/25/6"
        }
      ],
      "tags": [
        "disputed"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2024-56431",
    "datePublished": "2024-12-25T00:00:00.000Z",
    "dateReserved": "2024-12-24T00:00:00.000Z",
    "dateUpdated": "2025-05-07T19:45:58.528Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}