WID-SEC-W-2026-1190

Vulnerability from csaf_certbund - Published: 2026-04-20 22:00 - Updated: 2026-05-27 22:00
Summary
GNU libc: Mehrere Schwachstellen
Severity
Kritisch
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 GNU libc ist die Basis C Bibliothek unter Linux sowie anderen Unix-Betriebssystemen, welche die Systemaufrufe sowie Basisfunktionalität bereitstellt.
Angriff: Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in GNU libc ausnutzen, um Dateien zu manipulieren, einen Denial-of-Service-Zustand zu verursachen oder andere, nicht näher spezifizierte Angriffe durchzuführen.
Betroffene Betriebssysteme: - Linux - UNIX
Affected products
Product Identifier Version Remediation
SUSE Linux
SUSE
cpe:/o:suse:suse_linux:-
SUSE openSUSE
SUSE
cpe:/o:suse:opensuse:-
Affected products
Product Identifier Version Remediation
SUSE Linux
SUSE
cpe:/o:suse:suse_linux:-
Red Hat Enterprise Linux
Red Hat
cpe:/o:redhat:enterprise_linux:-
SUSE openSUSE
SUSE
cpe:/o:suse:opensuse:-
Fedora Linux
Fedora
cpe:/o:fedoraproject:fedora:-
Product Identifier Version Remediation
Open Source GNU libc <=2.43
Open Source / GNU libc
<=2.43
Affected products
Product Identifier Version Remediation
SUSE Linux
SUSE
cpe:/o:suse:suse_linux:-
Red Hat Enterprise Linux
Red Hat
cpe:/o:redhat:enterprise_linux:-
SUSE openSUSE
SUSE
cpe:/o:suse:opensuse:-
Fedora Linux
Fedora
cpe:/o:fedoraproject:fedora:-
Product Identifier Version Remediation
Open Source GNU libc <=2.43
Open Source / GNU libc
<=2.43

{
  "document": {
    "aggregate_severity": {
      "text": "kritisch"
    },
    "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 GNU libc ist die Basis C Bibliothek unter Linux sowie anderen Unix-Betriebssystemen, welche die Systemaufrufe sowie Basisfunktionalit\u00e4t bereitstellt.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in GNU libc ausnutzen, um Dateien zu manipulieren, einen Denial-of-Service-Zustand zu verursachen oder andere, nicht n\u00e4her spezifizierte Angriffe 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-2026-1190 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1190.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1190 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1190"
      },
      {
        "category": "external",
        "summary": "OSS Security Mailing List vom 2026-04-20",
        "url": "https://seclists.org/oss-sec/2026/q2/189"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-CED72AB158 vom 2026-04-30",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-ced72ab158"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:12740 vom 2026-05-01",
        "url": "https://access.redhat.com/errata/RHSA-2026:12740"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-4B7780802C vom 2026-05-01",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-4b7780802c"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2026:10770-1 vom 2026-05-15",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/RZ66BJVG5ICINPYD2UIFBTZGO2QB73FQ/"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2026:20764-1 vom 2026-05-19",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/KXZJBCTUEFVIXIGM4B4CGZUUH4CCN6SO/"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:21682-1 vom 2026-05-19",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026155.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:21688-1 vom 2026-05-21",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026237.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:21780-1 vom 2026-05-26",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026283.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:21751-1 vom 2026-05-26",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026307.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:21807-1 vom 2026-05-27",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026338.html"
      }
    ],
    "source_lang": "en-US",
    "title": "GNU libc: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-05-27T22:00:00.000+00:00",
      "generator": {
        "date": "2026-05-28T07:27:38.449+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1190",
      "initial_release_date": "2026-04-20T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-04-20T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-04-21T22:00:00.000+00:00",
          "number": "2",
          "summary": "Korrektur Versionsangabe, defekte Links entfernt"
        },
        {
          "date": "2026-05-03T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Fedora und Red Hat aufgenommen"
        },
        {
          "date": "2026-05-05T22:00:00.000+00:00",
          "number": "4",
          "summary": "CVE CVE-2026-5358 zur\u00fcckgezogen"
        },
        {
          "date": "2026-05-17T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von openSUSE aufgenommen"
        },
        {
          "date": "2026-05-18T22:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von openSUSE aufgenommen"
        },
        {
          "date": "2026-05-19T22:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-05-21T22:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-05-26T22:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-05-27T22:00:00.000+00:00",
          "number": "10",
          "summary": "Neue Updates von SUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "10"
    }
  },
  "product_tree": {
    "branches": [
      {
        "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": "\u003c=2.43",
                "product": {
                  "name": "Open Source GNU libc \u003c=2.43",
                  "product_id": "T053037"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c=2.43",
                "product": {
                  "name": "Open Source GNU libc \u003c=2.43",
                  "product_id": "T053037-fixed"
                }
              }
            ],
            "category": "product_name",
            "name": "GNU libc"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux",
            "product": {
              "name": "Red Hat Enterprise Linux",
              "product_id": "67646",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:enterprise_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      },
      {
        "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-2026-5358",
      "product_status": {
        "known_affected": [
          "T002207",
          "T027843"
        ]
      },
      "release_date": "2026-04-20T22:00:00.000+00:00",
      "title": "CVE-2026-5358"
    },
    {
      "cve": "CVE-2026-5450",
      "product_status": {
        "known_affected": [
          "T002207",
          "67646",
          "T027843",
          "74185"
        ],
        "last_affected": [
          "T053037"
        ]
      },
      "release_date": "2026-04-20T22:00:00.000+00:00",
      "title": "CVE-2026-5450"
    },
    {
      "cve": "CVE-2026-5928",
      "product_status": {
        "known_affected": [
          "T002207",
          "67646",
          "T027843",
          "74185"
        ],
        "last_affected": [
          "T053037"
        ]
      },
      "release_date": "2026-04-20T22:00:00.000+00:00",
      "title": "CVE-2026-5928"
    }
  ]
}


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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.

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