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WID-SEC-W-2026-2658

Vulnerability from csaf_certbund - Published: 2026-08-04 22:00 - Updated: 2026-08-05 22:00
Summary
X.Org X11 (libXfont2): Mehrere Schwachstellen ermöglichen Privilegieneskalation und Denial of Service
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.
Angriff: Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in X.Org X11 ausnutzen, um seine Privilegien zu erhöhen, und um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux - UNIX
CVE-2026-44950
Affected products
Product Identifier Version Remediation
Open Source X.Org X11 libXfont2 <2.0.9
Open Source / X.Org X11
 libXfont2 <2.0.9
SUSE Linux
SUSE
 cpe:/o:suse:suse_linux:- —
CVE-2026-59679
Affected products
Known affected 2 products, the same list as for CVE-2026-44950
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.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in X.Org X11 ausnutzen, um seine Privilegien zu erh\u00f6hen, und um einen Denial of Service 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-2026-2658 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2658.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-2658 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2658"
      },
      {
        "category": "external",
        "summary": "X.Org Security Advisory vom 2026-08-04",
        "url": "https://seclists.org/oss-sec/2026/q3/436"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:3500-1 vom 2026-08-05",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028147.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:3499-1 vom 2026-08-05",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028148.html"
      }
    ],
    "source_lang": "en-US",
    "title": "X.Org X11 (libXfont2): Mehrere Schwachstellen erm\u00f6glichen Privilegieneskalation und Denial of Service",
    "tracking": {
      "current_release_date": "2026-08-05T22:00:00.000+00:00",
      "generator": {
        "date": "2026-08-06T08:52:37.373+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-2658",
      "initial_release_date": "2026-08-04T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-08-04T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-08-05T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von SUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "libXfont2 \u003c2.0.9",
                "product": {
                  "name": "Open Source X.Org X11 libXfont2 \u003c2.0.9",
                  "product_id": "T057547"
                }
              },
              {
                "category": "product_version",
                "name": "libXfont2 2.0.9",
                "product": {
                  "name": "Open Source X.Org X11 libXfont2 2.0.9",
                  "product_id": "T057547-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:x:x.org_x11:libxfont2__2.0.9"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "X.Org X11"
          }
        ],
        "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-2026-44950",
      "product_status": {
        "known_affected": [
          "T057547",
          "T054646"
        ]
      },
      "release_date": "2026-08-04T22:00:00.000+00:00",
      "title": "CVE-2026-44950"
    },
    {
      "cve": "CVE-2026-59679",
      "product_status": {
        "known_affected": [
          "T057547",
          "T054646"
        ]
      },
      "release_date": "2026-08-04T22:00:00.000+00:00",
      "title": "CVE-2026-59679"
    }
  ]
}



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