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CVE-2026-5673

Full vulnerability record from the local CVENow database.

Description

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
HIGH
CVSS score
7.1 (v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-04-06 10:16:03.400000
Last modified
2026-10-26 21:10:00.170000
View original CVE JSON
{
  "id": "CVE-2026-5673",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-06T10:16:03.400",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
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      "value": "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."
    },
    {
      "lang": "es",
      "value": "Se encontró una falla en libtheora. Esta vulnerabilidad de lectura fuera de límites basada en el heap existe dentro del analizador AVI (Audio Video Interleave), específicamente en la función avi_parse_input_file(). Un atacante local podría explotar esto engañando a un usuario para que abra un archivo AVI especialmente diseñado que contiene un sub-chunk de encabezado truncado. Esto podría conducir a una denegación de servicio (caída de la aplicación) o potencialmente filtrar información sensible del heap."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux 10",
          "defaultStatus": "affected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "libtheora",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
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        },
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        "type": "Secondary",
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          "baseScore": 5.6,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
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        "exploitabilityScore": 1.3,
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          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
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          "availabilityImpact": "HIGH"
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      }
    ],
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-06T17:50:45.440733Z",
          "id": "CVE-2026-5673",
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          "role": "CISA Coordinator",
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  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
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          "value": "CWE-125"
        }
      ]
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  ],
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      "url": "https://github.com/xiph/theora/issues/24",
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}