FKIE_CVE-2026-0665

Vulnerability from fkie_nvd - Published: 2026-02-18 21:16 - Updated: 2026-02-19 15:53
Severity ?
6.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Summary
An off-by-one error was found in QEMU's KVM Xen guest support. A malicious guest could use this flaw to trigger out-of-bounds heap accesses in the QEMU process via the emulated Xen physdev hypercall interface, leading to a denial of service or potential memory corruption.
References
patrick@puiterwijk.orghttps://access.redhat.com/security/cve/CVE-2026-0665
patrick@puiterwijk.orghttps://bugzilla.redhat.com/show_bug.cgi?id=2428640
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An off-by-one error was found in QEMU\u0027s KVM Xen guest support. A malicious guest could use this flaw to trigger out-of-bounds heap accesses in the QEMU process via the emulated Xen physdev hypercall interface, leading to a denial of service or potential memory corruption."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un error \u0027off-by-one\u0027 (desbordamiento por un elemento) en el soporte de QEMU para invitados KVM Xen. Un invitado malicioso podr\u00eda aprovechar este fallo para desencadenar accesos fuera de l\u00edmite a la pila en el proceso de QEMU a trav\u00e9s de la interfaz de hiperllamada physdev de Xen emulada, lo que llevar\u00eda a una denegaci\u00f3n de servicio o a una posible corrupci\u00f3n de memoria."
    }
  ],
  "id": "CVE-2026-0665",
  "lastModified": "2026-02-19T15:53:02.850",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 4.0,
        "source": "patrick@puiterwijk.org",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-18T21:16:22.633",
  "references": [
    {
      "source": "patrick@puiterwijk.org",
      "url": "https://access.redhat.com/security/cve/CVE-2026-0665"
    },
    {
      "source": "patrick@puiterwijk.org",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2428640"
    }
  ],
  "sourceIdentifier": "patrick@puiterwijk.org",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "patrick@puiterwijk.org",
      "type": "Secondary"
    }
  ]
}


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