FKIE_CVE-2026-5121

Vulnerability from fkie_nvd - Published: 2026-03-30 08:16 - Updated: 2026-03-31 15:16
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-5121
secalert@redhat.comhttps://github.com/libarchive/libarchive/pull/2934
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un fallo en libarchive. En sistemas de 32 bits, existe una vulnerabilidad de desbordamiento de entero en la l\u00f3gica de asignaci\u00f3n de punteros de bloque zisofs. Un atacante remoto puede explotar esto al proporcionar una imagen ISO9660 especialmente dise\u00f1ada, lo que puede llevar a un desbordamiento de b\u00fafer de pila. Esto podr\u00eda permitir potencialmente la ejecuci\u00f3n de c\u00f3digo arbitrario en el sistema afectado."
    }
  ],
  "id": "CVE-2026-5121",
  "lastModified": "2026-03-31T15:16:22.173",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-30T08:16:18.780",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-5121"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://github.com/libarchive/libarchive/pull/2934"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.