WID-SEC-W-2026-3248

Vulnerability from csaf_certbund - Published: 2026-09-08 22:00 - Updated: 2026-09-16 22:00
Summary
Xen: Mehrere Schwachstellen
Severity
Hoch
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: Xen ist ein Virtueller-Maschinen-Monitor (VMM), der Hardware (x86, IA-64, PowerPC) für die darauf laufenden Systeme (Domains) paravirtualisiert.
Angriff: Ein Angreifer kann mehrere Schwachstellen in Xen ausnutzen, um einen Denial of Service Angriff durchzuführen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen und Daten zu manipulieren.
Betroffene Betriebssysteme: - Linux
Affected products
Product Identifier Version Remediation
Open Source Xen 4.17.x
Open Source / Xen
cpe:/o:xen:xen:4.17.x 4.17.x
Fedora Linux
Fedora
cpe:/o:fedoraproject:fedora:- —
SUSE Linux
SUSE
cpe:/o:suse:suse_linux:- —
Affected products
Known affected 3 products, the same list as for CVE-2026-62437
Affected products
Product Identifier Version Remediation
Open Source Xen 4.19.x
Open Source / Xen
cpe:/o:xen:xen:4.19.x 4.19.x
Open Source Xen 4.20.x
Open Source / Xen
cpe:/o:xen:xen:4.20.x 4.20.x
Open Source Xen 4.18.x
Open Source / Xen
cpe:/o:xen:xen:4.18.x 4.18.x
Open Source Xen 4.22.x
Open Source / Xen
cpe:/o:xen:xen:4.22.x 4.22.x
Open Source Xen 4.17.x
Open Source / Xen
cpe:/o:xen:xen:4.17.x 4.17.x
Fedora Linux
Fedora
cpe:/o:fedoraproject:fedora:- —
SUSE Linux
SUSE
cpe:/o:suse:suse_linux:- —
Open Source Xen 4.21.x
Open Source / Xen
cpe:/o:xen:xen:4.21.x 4.21.x
Affected products
Product Identifier Version Remediation
Open Source Xen 4.18.x
Open Source / Xen
cpe:/o:xen:xen:4.18.x 4.18.x
Open Source Xen 4.17.x
Open Source / Xen
cpe:/o:xen:xen:4.17.x 4.17.x
Fedora Linux
Fedora
cpe:/o:fedoraproject:fedora:- —
SUSE Linux
SUSE
cpe:/o:suse:suse_linux:- —
Affected products
Known affected 8 products, the same list as for CVE-2026-79603
Affected products
Known affected 8 products, the same list as for CVE-2026-79603

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Xen ist ein Virtueller-Maschinen-Monitor (VMM), der Hardware (x86, IA-64, PowerPC) f\u00fcr die darauf laufenden Systeme (Domains) paravirtualisiert.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann mehrere Schwachstellen in Xen ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren, beliebigen Code auszuf\u00fchren, Sicherheitsma\u00dfnahmen zu umgehen und Daten zu manipulieren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-3248 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3248.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-3248 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3248"
      },
      {
        "category": "external",
        "summary": "Xen Security Advisory XSA-509 vom 2026-09-08",
        "url": "https://xenbits.xen.org/xsa/advisory-509.html"
      },
      {
        "category": "external",
        "summary": "Xen Security Advisory XSA-510 vom 2026-09-08",
        "url": "https://xenbits.xen.org/xsa/advisory-510.html"
      },
      {
        "category": "external",
        "summary": "Xen Security Advisory XSA-511 vom 2026-09-08",
        "url": "https://xenbits.xen.org/xsa/advisory-511.html"
      },
      {
        "category": "external",
        "summary": "Xen Security Advisory XSA-512 vom 2026-09-08",
        "url": "https://xenbits.xen.org/xsa/advisory-512.html"
      },
      {
        "category": "external",
        "summary": "Xen Security Advisory XSA-513 vom 2026-09-08",
        "url": "https://xenbits.xen.org/xsa/advisory-513.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:4089-1 vom 2026-09-13",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028948.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:4087-1 vom 2026-09-13",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028950.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:4090-1 vom 2026-09-13",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028947.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:4088-1 vom 2026-09-13",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028949.html"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-1D448C1D40 vom 2026-09-16",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-1d448c1d40"
      }
    ],
    "source_lang": "en-US",
    "title": "Xen: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-09-16T22:00:00.000+00:00",
      "generator": {
        "date": "2026-09-17T10:19:25.373+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-3248",
      "initial_release_date": "2026-09-08T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-09-08T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-09-13T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-09-16T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Fedora aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Fedora Linux",
            "product": {
              "name": "Fedora Linux",
              "product_id": "74178",
              "product_identification_helper": {
                "cpe": "cpe:/o:fedoraproject:fedora:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Fedora"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "4.17.x",
                "product": {
                  "name": "Open Source Xen 4.17.x",
                  "product_id": "T059187",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:4.17.x"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "4.22.x",
                "product": {
                  "name": "Open Source Xen 4.22.x",
                  "product_id": "T059188",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:4.22.x"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "4.21.x",
                "product": {
                  "name": "Open Source Xen 4.21.x",
                  "product_id": "T059189",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:4.21.x"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "4.20.x",
                "product": {
                  "name": "Open Source Xen 4.20.x",
                  "product_id": "T059190",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:4.20.x"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "4.19.x",
                "product": {
                  "name": "Open Source Xen 4.19.x",
                  "product_id": "T059191",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:4.19.x"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "4.18.x",
                "product": {
                  "name": "Open Source Xen 4.18.x",
                  "product_id": "T059192",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:4.18.x"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Xen"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T054646",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-62437",
      "product_status": {
        "known_affected": [
          "T059187",
          "74178",
          "T054646"
        ]
      },
      "release_date": "2026-09-08T22:00:00.000+00:00",
      "title": "CVE-2026-62437"
    },
    {
      "cve": "CVE-2026-79602",
      "product_status": {
        "known_affected": [
          "T059187",
          "74178",
          "T054646"
        ]
      },
      "release_date": "2026-09-08T22:00:00.000+00:00",
      "title": "CVE-2026-79602"
    },
    {
      "cve": "CVE-2026-79603",
      "product_status": {
        "known_affected": [
          "T059191",
          "T059190",
          "T059192",
          "T059188",
          "T059187",
          "74178",
          "T054646",
          "T059189"
        ]
      },
      "release_date": "2026-09-08T22:00:00.000+00:00",
      "title": "CVE-2026-79603"
    },
    {
      "cve": "CVE-2026-79604",
      "product_status": {
        "known_affected": [
          "T059192",
          "T059187",
          "74178",
          "T054646"
        ]
      },
      "release_date": "2026-09-08T22:00:00.000+00:00",
      "title": "CVE-2026-79604"
    },
    {
      "cve": "CVE-2026-79605",
      "product_status": {
        "known_affected": [
          "T059191",
          "T059190",
          "T059192",
          "T059188",
          "T059187",
          "74178",
          "T054646",
          "T059189"
        ]
      },
      "release_date": "2026-09-08T22:00:00.000+00:00",
      "title": "CVE-2026-79605"
    },
    {
      "cve": "CVE-2026-79606",
      "product_status": {
        "known_affected": [
          "T059191",
          "T059190",
          "T059192",
          "T059188",
          "T059187",
          "74178",
          "T054646",
          "T059189"
        ]
      },
      "release_date": "2026-09-08T22:00:00.000+00:00",
      "title": "CVE-2026-79606"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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