{
  "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 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."
    }, {
      "category" : "description",
      "text" : "Xen ist ein Virtueller-Maschinen-Monitor (VMM), der Hardware (x86, IA-64, PowerPC) für die darauf laufenden Systeme (Domains) paravirtualisiert.\r\nCitrix XenServer ist eine Lösung für das Management, die Konfiguration und den Betrieb virtueller Maschinen auf Servern.",
      "title" : "Produktbeschreibung"
    }, {
      "category" : "summary",
      "text" : "Ein Angreifer kann mehrere Schwachstellen in Xen und Citrix Systems XenServer ausnutzen, um seine Privilegien zu erhöhen, Sicherheitsmaßnahmen zu umgehen, Daten zu verändern und offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.",
      "title" : "Angriff"
    }, {
      "category" : "general",
      "text" : "- Linux\n- Sonstiges\n- Windows",
      "title" : "Betroffene Betriebssysteme"
    } ],
    "publisher" : {
      "category" : "other",
      "contact_details" : "csaf-provider@cert-bund.de",
      "name" : "Bundesamt für Sicherheit in der Informationstechnik",
      "namespace" : "https://www.bsi.bund.de"
    },
    "references" : [ {
      "category" : "self",
      "summary" : "WID-SEC-W-2026-1306 - CSAF Version",
      "url" : "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1306.json"
    }, {
      "category" : "self",
      "summary" : "WID-SEC-2026-1306 - Portal Version",
      "url" : "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1306"
    }, {
      "category" : "external",
      "summary" : "Xen Security Advisory vom 2026-04-28",
      "url" : "https://xenbits.xen.org/xsa/advisory-483.html"
    }, {
      "category" : "external",
      "summary" : "Xen Security Advisory vom 2026-04-28",
      "url" : "https://xenbits.xen.org/xsa/advisory-484.html"
    }, {
      "category" : "external",
      "summary" : "Xen Security Advisory vom 2026-04-28",
      "url" : "https://xenbits.xen.org/xsa/advisory-485.html"
    }, {
      "category" : "external",
      "summary" : "Xen Security Advisory vom 2026-04-28",
      "url" : "https://xenbits.xen.org/xsa/advisory-486.html"
    }, {
      "category" : "external",
      "summary" : "Xen Security Advisory vom 2026-04-28",
      "url" : "https://xenbits.xen.org/xsa/advisory-487.html"
    }, {
      "category" : "external",
      "summary" : "Xen Security Advisory vom 2026-04-28",
      "url" : "https://xenbits.xen.org/xsa/advisory-489.html"
    }, {
      "category" : "external",
      "summary" : "Citrix XenServer Security Update vom 2026-04-28",
      "url" : "https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696527&articleURL=XenServer_Security_Update_for_Multiple_Issues"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2026:1657-1 vom 2026-04-29",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025766.html"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-2026-0C9AFF64A5 vom 2026-04-29",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-2026-0c9aff64a5"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-2026-78CD69D9AE vom 2026-04-29",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-2026-78cd69d9ae"
    }, {
      "category" : "external",
      "summary" : "Debian Security Advisory DSA-6238 vom 2026-05-04",
      "url" : "https://lists.debian.org/debian-security-announce/2026/msg00148.html"
    }, {
      "category" : "external",
      "summary" : "Debian Security Advisory DSA-6243 vom 2026-05-04",
      "url" : "https://lists.debian.org/debian-security-announce/2026/msg00154.html"
    }, {
      "category" : "external",
      "summary" : "openSUSE Security Update OPENSUSE-SU-2026:10660-1 vom 2026-05-04",
      "url" : "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/2ZGHLYRMCFK5DY7XYNQC3RXMO73GDQX6/"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2026:1692-1 vom 2026-05-05",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2026-May/025844.html"
    } ],
    "source_lang" : "en-US",
    "title" : "Xen und Citrix Systems XenServer: Mehrere Schwachstellen",
    "tracking" : {
      "current_release_date" : "2026-05-05T22:00:00.000+00:00",
      "generator" : {
        "date" : "2026-05-06T08:41:08.645+00:00",
        "engine" : {
          "name" : "BSI-WID",
          "version" : "1.5.0"
        }
      },
      "id" : "WID-SEC-W-2026-1306",
      "initial_release_date" : "2026-04-28T22:00:00.000+00:00",
      "revision_history" : [ {
        "date" : "2026-04-28T22:00:00.000+00:00",
        "number" : "1",
        "summary" : "Initiale Fassung"
      }, {
        "date" : "2026-04-29T22:00:00.000+00:00",
        "number" : "2",
        "summary" : "Neue Updates von SUSE und Fedora aufgenommen"
      }, {
        "date" : "2026-05-03T22:00:00.000+00:00",
        "number" : "3",
        "summary" : "Neue Updates von Debian und European Union Vulnerability Database aufgenommen"
      }, {
        "date" : "2026-05-04T22:00:00.000+00:00",
        "number" : "4",
        "summary" : "Neue Updates von openSUSE aufgenommen"
      }, {
        "date" : "2026-05-05T22:00:00.000+00:00",
        "number" : "5",
        "summary" : "Neue Updates von SUSE aufgenommen"
      } ],
      "status" : "final",
      "version" : "5"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_version",
          "name" : "8.4",
          "product" : {
            "name" : "Citrix Systems XenServer 8.4",
            "product_id" : "T053402",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:citrix:xenserver:8.4"
            }
          }
        } ],
        "category" : "product_name",
        "name" : "XenServer"
      } ],
      "category" : "vendor",
      "name" : "Citrix Systems"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Debian Linux",
        "product" : {
          "name" : "Debian Linux",
          "product_id" : "2951",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:debian:debian_linux:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Debian"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Fedora Linux",
        "product" : {
          "name" : "Fedora Linux",
          "product_id" : "74185",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:fedoraproject:fedora:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Fedora"
    }, {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_version_range",
          "name" : ">=4.0",
          "product" : {
            "name" : "Open Source Xen >=4.0",
            "product_id" : "T053396"
          }
        }, {
          "category" : "product_version_range",
          "name" : ">=4.0",
          "product" : {
            "name" : "Open Source Xen >=4.0",
            "product_id" : "T053396-fixed"
          }
        }, {
          "category" : "product_version",
          "name" : "XSA-419",
          "product" : {
            "name" : "Open Source Xen XSA-419",
            "product_id" : "T053397",
            "product_identification_helper" : {
              "cpe" : "cpe:/o:xen:xen:xsa-419"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "XAPI",
          "product" : {
            "name" : "Open Source Xen XAPI",
            "product_id" : "T053398",
            "product_identification_helper" : {
              "cpe" : "cpe:/o:xen:xen:xapi"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : ">=4.2",
          "product" : {
            "name" : "Open Source Xen >=4.2",
            "product_id" : "T053399"
          }
        }, {
          "category" : "product_version_range",
          "name" : ">=4.2",
          "product" : {
            "name" : "Open Source Xen >=4.2",
            "product_id" : "T053399-fixed"
          }
        }, {
          "category" : "product_version_range",
          "name" : "Linux kernel >=4.13",
          "product" : {
            "name" : "Open Source Xen Linux kernel >=4.13",
            "product_id" : "T053400"
          }
        }, {
          "category" : "product_version_range",
          "name" : "Linux kernel >=4.13",
          "product" : {
            "name" : "Open Source Xen Linux kernel >=4.13",
            "product_id" : "T053400-fixed"
          }
        }, {
          "category" : "product_version_range",
          "name" : "Linux PVH or HVM >=3.8",
          "product" : {
            "name" : "Open Source Xen Linux PVH or HVM >=3.8",
            "product_id" : "T053401"
          }
        }, {
          "category" : "product_version_range",
          "name" : "Linux PVH or HVM >=3.8",
          "product" : {
            "name" : "Open Source Xen Linux PVH or HVM >=3.8",
            "product_id" : "T053401-fixed"
          }
        } ],
        "category" : "product_name",
        "name" : "Xen"
      } ],
      "category" : "vendor",
      "name" : "Open Source"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "SUSE Linux",
        "product" : {
          "name" : "SUSE Linux",
          "product_id" : "T002207",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:suse:suse_linux:-"
          }
        }
      }, {
        "category" : "product_name",
        "name" : "SUSE openSUSE",
        "product" : {
          "name" : "SUSE openSUSE",
          "product_id" : "T027843",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:suse:opensuse:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "SUSE"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2026-23558",
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T027843", "T053402", "74185", "T053399" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-23558"
  }, {
    "cve" : "CVE-2026-23556",
    "product_status" : {
      "known_affected" : [ "T053397", "2951", "T002207", "T027843", "T053402", "74185" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-23556"
  }, {
    "cve" : "CVE-2026-23559",
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T027843", "T053402", "74185", "T053398" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-23559"
  }, {
    "cve" : "CVE-2026-23560",
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T027843", "T053402", "74185", "T053398" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-23560"
  }, {
    "cve" : "CVE-2026-23561",
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T027843", "T053402", "74185", "T053398" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-23561"
  }, {
    "cve" : "CVE-2026-23562",
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T027843", "74185", "T053398" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-23562"
  }, {
    "cve" : "CVE-2026-42486",
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T027843", "74185", "T053398" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-42486"
  }, {
    "cve" : "CVE-2026-23557",
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T027843", "74185" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-23557"
  }, {
    "cve" : "CVE-2026-31786",
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T027843", "74185" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-31786"
  }, {
    "cve" : "CVE-2026-31787",
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T027843", "74185" ]
    },
    "release_date" : "2026-04-28T22:00:00.000+00:00",
    "title" : "CVE-2026-31787"
  } ]
}