WID-SEC-W-2026-3153

Vulnerability from csaf_certbund - Published: 2026-09-02 22:00 - Updated: 2026-09-08 22:00
Summary
zlib: Schwachstelle ermöglicht Denial of Service und Integritätsverlust
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: Die zlib ist eine freie Programmbibliothek zum Komprimieren und Dekomprimieren von Daten.
Angriff: Ein Angreifer kann eine Schwachstelle in zlib ausnutzen, um einen Denial of Service Angriff durchzuführen oder um Speicher zu überschreiben.
Betroffene Betriebssysteme: - Linux - UNIX
CVE-2026-85091
Affected products
Product Identifier Version Remediation
Open Source zlib 1.3.1-1.3.2
Open Source / zlib
 cpe:/a:gnu:zlib:1.3.1_-_1.3.2 1.3.1-1.3.2
Microsoft Azure Linux azl3
Microsoft / Azure Linux
 cpe:/o:microsoft:azure_linux:azl3 azl3
References
To clipboard 

{
  "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": "Die zlib ist eine freie Programmbibliothek zum Komprimieren und Dekomprimieren von Daten.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann eine Schwachstelle in zlib ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren oder um Speicher zu \u00fcberschreiben.",
        "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-2026-3153 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3153.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-3153 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3153"
      },
      {
        "category": "external",
        "summary": "CVE Record vom 2026-09-02",
        "url": "https://www.cve.org/CVERecord?id=CVE-2026-85091"
      },
      {
        "category": "external",
        "summary": "gist.github.com vom 2026-09-02",
        "url": "https://gist.github.com/thesmartshadow/e0b9481792afb7c31e86fee1ff084490"
      },
      {
        "category": "external",
        "summary": "VulnCheck Advisory vom 2026-09-02",
        "url": "https://www.vulncheck.com/advisories/zlib-1.3.1.2-through-1.3.2-heap-buffer-overflow-via-gz-vacate"
      },
      {
        "category": "external",
        "summary": "Microsoft Security Update Guide vom 2026-09-08",
        "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Sep#OpenSourceSoftware"
      }
    ],
    "source_lang": "en-US",
    "title": "zlib: Schwachstelle erm\u00f6glicht Denial of Service und Integrit\u00e4tsverlust",
    "tracking": {
      "current_release_date": "2026-09-08T22:00:00.000+00:00",
      "generator": {
        "date": "2026-09-09T07:33:00.030+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-3153",
      "initial_release_date": "2026-09-02T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-09-02T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-09-08T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates aufgenommen"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "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",
                "name": "1.3.1-1.3.2",
                "product": {
                  "name": "Open Source zlib 1.3.1-1.3.2",
                  "product_id": "T059011",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:gnu:zlib:1.3.1_-_1.3.2"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "zlib"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-85091",
      "product_status": {
        "known_affected": [
          "T059011",
          "T049210"
        ]
      },
      "release_date": "2026-09-02T22:00:00.000+00:00",
      "title": "CVE-2026-85091"
    }
  ]
}



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