WID-SEC-W-2026-1257

Vulnerability from csaf_certbund - Published: 2026-04-23 22:00 - Updated: 2026-05-28 22:00
Summary
libxml2: Schwachstelle ermöglicht 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: libxml ist ein C Parser und Toolkit, welches für das Gnome Projekt entwickelt wurde.
Angriff: Ein Angreifer aus einem angrenzenden Netzwerk kann eine Schwachstelle in libxml2 ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Sonstiges - UNIX - Windows
CVE-2026-6732
Affected products
Product Identifier Version Remediation
IBM AIX 7.3
IBM / AIX
 cpe:/o:ibm:aix:7.3 7.3
IBM AIX 7.2
IBM / AIX
 cpe:/o:ibm:aix:7.2 7.2
IBM VIOS 3.1
IBM / VIOS
 cpe:/a:ibm:vios:3.1 3.1
IBM VIOS 4.1
IBM / VIOS
 cpe:/a:ibm:vios:4.1 4.1
Google Container-Optimized OS
Google
 cpe:/o:google:container-optimized_os:- —
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": "libxml ist ein C Parser und Toolkit, welches f\u00fcr das Gnome Projekt entwickelt wurde.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer aus einem angrenzenden Netzwerk kann eine Schwachstelle in libxml2 ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Sonstiges\n- UNIX\n- Windows",
        "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-2026-1257 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1257.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1257 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1257"
      },
      {
        "category": "external",
        "summary": "Red Hat Bugtracker 2461300 vom 2026-04-23",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461300"
      },
      {
        "category": "external",
        "summary": "Gitlab PoC vom 2026-04-23",
        "url": "https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097"
      },
      {
        "category": "external",
        "summary": "Gitlab Fix vom 2026-04-23",
        "url": "https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411"
      },
      {
        "category": "external",
        "summary": "Container-Optimized OS release notes vom 2026-05-27",
        "url": "https://docs.cloud.google.com/container-optimized-os/docs/release-notes#May_26_2026"
      },
      {
        "category": "external",
        "summary": "IBM Security Bulletin 7274376 vom 2026-05-29",
        "url": "https://www.ibm.com/support/pages/node/7274376"
      }
    ],
    "source_lang": "en-US",
    "title": "libxml2: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2026-05-28T22:00:00.000+00:00",
      "generator": {
        "date": "2026-05-29T07:31:36.199+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1257",
      "initial_release_date": "2026-04-23T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-04-23T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-05-27T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates aufgenommen"
        },
        {
          "date": "2026-05-28T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von IBM und IBM-APAR aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Google Container-Optimized OS",
            "product": {
              "name": "Google Container-Optimized OS",
              "product_id": "1607324",
              "product_identification_helper": {
                "cpe": "cpe:/o:google:container-optimized_os:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Google"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "7.3",
                "product": {
                  "name": "IBM AIX 7.3",
                  "product_id": "1139691",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:ibm:aix:7.3"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "7.2",
                "product": {
                  "name": "IBM AIX 7.2",
                  "product_id": "434967",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:ibm:aix:7.2"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "AIX"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.1",
                "product": {
                  "name": "IBM VIOS 3.1",
                  "product_id": "1039165",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:ibm:vios:3.1"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "4.1",
                "product": {
                  "name": "IBM VIOS 4.1",
                  "product_id": "1522854",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:ibm:vios:4.1"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "VIOS"
          }
        ],
        "category": "vendor",
        "name": "IBM"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003e=2.13.0",
                "product": {
                  "name": "Open Source libxml2 \u003e=2.13.0",
                  "product_id": "T053292"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003e=2.13.0",
                "product": {
                  "name": "Open Source libxml2 \u003e=2.13.0",
                  "product_id": "T053292-fixed"
                }
              }
            ],
            "category": "product_name",
            "name": "libxml2"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-6732",
      "product_status": {
        "known_affected": [
          "1139691",
          "434967",
          "1039165",
          "1522854",
          "1607324"
        ]
      },
      "release_date": "2026-04-23T22:00:00.000+00:00",
      "title": "CVE-2026-6732"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Detection rules are retrieved from Rulezet.