WID-SEC-W-2026-1774

Vulnerability from csaf_certbund - Published: 2026-06-01 22:00 - Updated: 2026-06-09 22:00
Summary
X.Org X11 und Xwayland: Mehrere Schwachstellen
Severity
Mittel
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: Das X Window System dient der Erzeugung grafischer Oberflächen auf Unix Systemen. Xwayland ist ein X-Server für die Ausführung von X-Clients unter Wayland Display Servern. Wayland ist ein Ersatz für X.11 Display-Server.
Angriff: Ein Angreifer kann mehrere Schwachstellen in X.Org X11 und Xwayland ausnutzen, um Informationen offenzulegen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, und um einen nicht näher spezifizierten Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux - UNIX
CVE-2026-50256
Affected products
Product Identifier Version Remediation
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
Open Source Xwayland <24.1.12
Open Source / Xwayland
 <24.1.12
Open Source X.Org X11 Server <21.1.23
Open Source / X.Org X11
 Server <21.1.23
CVE-2026-50257
Affected products
Product Identifier Version Remediation
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
Open Source Xwayland <24.1.12
Open Source / Xwayland
 <24.1.12
Open Source X.Org X11 Server <21.1.23
Open Source / X.Org X11
 Server <21.1.23
CVE-2026-50258
Affected products
Product Identifier Version Remediation
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
Open Source Xwayland <24.1.12
Open Source / Xwayland
 <24.1.12
Open Source X.Org X11 Server <21.1.23
Open Source / X.Org X11
 Server <21.1.23
CVE-2026-50259
Affected products
Product Identifier Version Remediation
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
Open Source Xwayland <24.1.12
Open Source / Xwayland
 <24.1.12
Open Source X.Org X11 Server <21.1.23
Open Source / X.Org X11
 Server <21.1.23
CVE-2026-50260
Affected products
Product Identifier Version Remediation
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
Open Source Xwayland <24.1.12
Open Source / Xwayland
 <24.1.12
Open Source X.Org X11 Server <21.1.23
Open Source / X.Org X11
 Server <21.1.23
CVE-2026-50261
Affected products
Product Identifier Version Remediation
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
Open Source Xwayland <24.1.12
Open Source / Xwayland
 <24.1.12
Open Source X.Org X11 Server <21.1.23
Open Source / X.Org X11
 Server <21.1.23
CVE-2026-50262
Affected products
Product Identifier Version Remediation
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
Open Source Xwayland <24.1.12
Open Source / Xwayland
 <24.1.12
Open Source X.Org X11 Server <21.1.23
Open Source / X.Org X11
 Server <21.1.23
CVE-2026-50263
Affected products
Product Identifier Version Remediation
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
Open Source Xwayland <24.1.12
Open Source / Xwayland
 <24.1.12
Open Source X.Org X11 Server <21.1.23
Open Source / X.Org X11
 Server <21.1.23
CVE-2026-50264
Affected products
Product Identifier Version Remediation
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
Open Source Xwayland <24.1.12
Open Source / Xwayland
 <24.1.12
Open Source X.Org X11 Server <21.1.23
Open Source / X.Org X11
 Server <21.1.23
References
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "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": "Das X Window System dient der Erzeugung grafischer Oberfl\u00e4chen auf Unix Systemen.\r\nXwayland ist ein X-Server f\u00fcr die Ausf\u00fchrung von X-Clients unter Wayland Display Servern. Wayland ist ein Ersatz f\u00fcr X.11 Display-Server.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann mehrere Schwachstellen in X.Org X11 und Xwayland ausnutzen, um Informationen offenzulegen, um seine Privilegien zu erh\u00f6hen, um einen Denial of Service Angriff durchzuf\u00fchren, und um einen nicht n\u00e4her spezifizierten Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "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-2026-1774 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1774.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1774 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1774"
      },
      {
        "category": "external",
        "summary": "X.Org Security Advisory vom 2026-06-01",
        "url": "https://lists.x.org/archives/xorg-announce/2026-June/003702.html"
      },
      {
        "category": "external",
        "summary": "Microsoft Security Update Guide vom 2026-06-09",
        "url": "https://msrc.microsoft.com/update-guide/"
      }
    ],
    "source_lang": "en-US",
    "title": "X.Org X11 und Xwayland: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-06-09T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-10T07:21:02.391+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1774",
      "initial_release_date": "2026-06-01T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-06-01T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-06-04T22:00:00.000+00:00",
          "number": "2",
          "summary": "CVE-Nummern erg\u00e4nzt"
        },
        {
          "date": "2026-06-07T22:00:00.000+00:00",
          "number": "3",
          "summary": "Referenz(en) aufgenommen: EUVD-2026-34815, EUVD-2026-34820, EUVD-2026-34819, EUVD-2026-34818, EUVD-2026-34817, EUVD-2026-34816, EUVD-2026-34814, EUVD-2026-34813, EUVD-2026-34812"
        },
        {
          "date": "2026-06-09T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates aufgenommen"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "azl3",
                "product": {
                  "name": "Microsoft Azure Linux azl3",
                  "product_id": "T049210",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:microsoft:azure_linux:azl3"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "Server \u003c21.1.23",
                "product": {
                  "name": "Open Source X.Org X11 Server \u003c21.1.23",
                  "product_id": "T054960"
                }
              },
              {
                "category": "product_version",
                "name": "Server 21.1.23",
                "product": {
                  "name": "Open Source X.Org X11 Server 21.1.23",
                  "product_id": "T054960-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:x:x.org_x11:server__21.1.23"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "X.Org X11"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c24.1.12",
                "product": {
                  "name": "Open Source Xwayland \u003c24.1.12",
                  "product_id": "T054961"
                }
              },
              {
                "category": "product_version",
                "name": "24.1.12",
                "product": {
                  "name": "Open Source Xwayland 24.1.12",
                  "product_id": "T054961-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:x.org:xwayland:24.1.12"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Xwayland"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-50256",
      "product_status": {
        "known_affected": [
          "T049210",
          "T054961",
          "T054960"
        ]
      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-50256"
    },
    {
      "cve": "CVE-2026-50257",
      "product_status": {
        "known_affected": [
          "T049210",
          "T054961",
          "T054960"
        ]
      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-50257"
    },
    {
      "cve": "CVE-2026-50258",
      "product_status": {
        "known_affected": [
          "T049210",
          "T054961",
          "T054960"
        ]
      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-50258"
    },
    {
      "cve": "CVE-2026-50259",
      "product_status": {
        "known_affected": [
          "T049210",
          "T054961",
          "T054960"
        ]
      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-50259"
    },
    {
      "cve": "CVE-2026-50260",
      "product_status": {
        "known_affected": [
          "T049210",
          "T054961",
          "T054960"
        ]
      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-50260"
    },
    {
      "cve": "CVE-2026-50261",
      "product_status": {
        "known_affected": [
          "T049210",
          "T054961",
          "T054960"
        ]
      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-50261"
    },
    {
      "cve": "CVE-2026-50262",
      "product_status": {
        "known_affected": [
          "T049210",
          "T054961",
          "T054960"
        ]
      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-50262"
    },
    {
      "cve": "CVE-2026-50263",
      "product_status": {
        "known_affected": [
          "T049210",
          "T054961",
          "T054960"
        ]
      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-50263"
    },
    {
      "cve": "CVE-2026-50264",
      "product_status": {
        "known_affected": [
          "T049210",
          "T054961",
          "T054960"
        ]
      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-50264"
    }
  ]
}



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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.
  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.