WID-SEC-W-2026-1358

Vulnerability from csaf_certbund - Published: 2026-05-04 22:00 - Updated: 2026-05-31 22:00
Summary
Red Hat Enterprise Linux (corosync): Mehrere Schwachstellen ermöglichen Denial of Service
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: Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution.
Angriff: Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux (corosync) ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux - UNIX
CVE-2026-35091
Affected products
Product Identifier Version Remediation
Debian Linux
Debian
 cpe:/o:debian:debian_linux:- —
Red Hat Enterprise Linux
Red Hat / Enterprise Linux
 cpe:/o:redhat:enterprise_linux:- —
Oracle Linux
Oracle
 cpe:/o:oracle:linux:- —
RESF Rocky Linux
RESF
 cpe:/o:resf:rocky_linux:- —
Red Hat Enterprise Linux <10
Red Hat / Enterprise Linux
 <10
CVE-2026-35092
Affected products
Product Identifier Version Remediation
Debian Linux
Debian
 cpe:/o:debian:debian_linux:- —
Red Hat Enterprise Linux
Red Hat / Enterprise Linux
 cpe:/o:redhat:enterprise_linux:- —
Oracle Linux
Oracle
 cpe:/o:oracle:linux:- —
RESF Rocky Linux
RESF
 cpe:/o:resf:rocky_linux:- —
Red Hat Enterprise Linux <10
Red Hat / Enterprise Linux
 <10
References
URL Category
https://wid.cert-bund.de/.well-known/csaf/white/2… self
https://wid.cert-bund.de/portal/wid/securityadvis… self
https://access.redhat.com/errata/RHSA-2026:13644 external
https://access.redhat.com/security/cve/cve-2026-35091 external
https://access.redhat.com/security/cve/cve-2026-35092 external
https://access.redhat.com/errata/RHSA-2026:13657 external
https://errata.build.resf.org/RLSA-2026:13657 external
https://errata.build.resf.org/RLSA-2026:13673 external
https://access.redhat.com/errata/RHSA-2026:14212 external
https://access.redhat.com/errata/RHSA-2026:14216 external
https://access.redhat.com/errata/RHSA-2026:14211 external
https://access.redhat.com/errata/RHSA-2026:14215 external
https://access.redhat.com/errata/RHSA-2026:14214 external
https://access.redhat.com/errata/RHSA-2026:14205 external
https://errata.build.resf.org/RLSA-2026:13644 external
https://access.redhat.com/errata/RHSA-2026:14213 external
https://access.redhat.com/errata/RHSA-2026:14210 external
https://linux.oracle.com/errata/ELSA-2026-13673.html external
https://lists.debian.org/debian-security-announce… external
https://linux.oracle.com/errata/ELSA-2026-13657.html external
https://linux.oracle.com/errata/ELSA-2026-13644.html external
https://access.redhat.com/errata/RHSA-2026:19043 external
https://access.redhat.com/errata/RHSA-2026:19200 external
https://access.redhat.com/errata/RHSA-2026:20916 external
https://errata.build.resf.org/RLSA-2026:19200 external
https://lists.debian.org/debian-lts-announce/2026… external
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": "Red Hat Enterprise Linux (RHEL) ist eine popul\u00e4re Linux-Distribution.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux (corosync) ausnutzen, 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-2026-1358 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1358.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1358 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1358"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:13644 vom 2026-05-04",
        "url": "https://access.redhat.com/errata/RHSA-2026:13644"
      },
      {
        "category": "external",
        "summary": "RedHat Customer Portal vom 2026-05-04",
        "url": "https://access.redhat.com/security/cve/cve-2026-35091"
      },
      {
        "category": "external",
        "summary": "RedHat Customer Portal vom 2026-05-04",
        "url": "https://access.redhat.com/security/cve/cve-2026-35092"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:13657 vom 2026-05-05",
        "url": "https://access.redhat.com/errata/RHSA-2026:13657"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:13657 vom 2026-05-06",
        "url": "https://errata.build.resf.org/RLSA-2026:13657"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:13673 vom 2026-05-06",
        "url": "https://errata.build.resf.org/RLSA-2026:13673"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14212 vom 2026-05-06",
        "url": "https://access.redhat.com/errata/RHSA-2026:14212"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14216 vom 2026-05-06",
        "url": "https://access.redhat.com/errata/RHSA-2026:14216"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14211 vom 2026-05-06",
        "url": "https://access.redhat.com/errata/RHSA-2026:14211"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14215 vom 2026-05-06",
        "url": "https://access.redhat.com/errata/RHSA-2026:14215"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14214 vom 2026-05-06",
        "url": "https://access.redhat.com/errata/RHSA-2026:14214"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14205 vom 2026-05-06",
        "url": "https://access.redhat.com/errata/RHSA-2026:14205"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:13644 vom 2026-05-06",
        "url": "https://errata.build.resf.org/RLSA-2026:13644"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14213 vom 2026-05-06",
        "url": "https://access.redhat.com/errata/RHSA-2026:14213"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14210 vom 2026-05-06",
        "url": "https://access.redhat.com/errata/RHSA-2026:14210"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-13673 vom 2026-05-07",
        "url": "https://linux.oracle.com/errata/ELSA-2026-13673.html"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DSA-6261 vom 2026-05-10",
        "url": "https://lists.debian.org/debian-security-announce/2026/msg00172.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-13657 vom 2026-05-11",
        "url": "https://linux.oracle.com/errata/ELSA-2026-13657.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-13644 vom 2026-05-11",
        "url": "https://linux.oracle.com/errata/ELSA-2026-13644.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:19043 vom 2026-05-19",
        "url": "https://access.redhat.com/errata/RHSA-2026:19043"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:19200 vom 2026-05-20",
        "url": "https://access.redhat.com/errata/RHSA-2026:19200"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:20916 vom 2026-05-26",
        "url": "https://access.redhat.com/errata/RHSA-2026:20916"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:19200 vom 2026-05-28",
        "url": "https://errata.build.resf.org/RLSA-2026:19200"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-4608 vom 2026-05-30",
        "url": "https://lists.debian.org/debian-lts-announce/2026/05/msg00053.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Red Hat Enterprise Linux (corosync): Mehrere Schwachstellen erm\u00f6glichen Denial of Service",
    "tracking": {
      "current_release_date": "2026-05-31T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-01T07:25:34.656+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1358",
      "initial_release_date": "2026-05-04T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-05-04T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-05-05T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Red Hat und Rocky Enterprise Software Foundation aufgenommen"
        },
        {
          "date": "2026-05-06T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Red Hat und Rocky Enterprise Software Foundation aufgenommen"
        },
        {
          "date": "2026-05-07T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2026-05-10T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2026-05-11T22:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2026-05-19T22:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-05-26T22:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-05-28T22:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von Rocky Enterprise Software Foundation aufgenommen"
        },
        {
          "date": "2026-05-31T22:00:00.000+00:00",
          "number": "10",
          "summary": "Neue Updates von Debian aufgenommen"
        }
      ],
      "status": "final",
      "version": "10"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Debian Linux",
            "product": {
              "name": "Debian Linux",
              "product_id": "2951",
              "product_identification_helper": {
                "cpe": "cpe:/o:debian:debian_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Debian"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Oracle Linux",
            "product": {
              "name": "Oracle Linux",
              "product_id": "T004914",
              "product_identification_helper": {
                "cpe": "cpe:/o:oracle:linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Oracle"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "RESF Rocky Linux",
            "product": {
              "name": "RESF Rocky Linux",
              "product_id": "T032255",
              "product_identification_helper": {
                "cpe": "cpe:/o:resf:rocky_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "RESF"
      },
      {
        "branches": [
          {
            "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": "product_version_range",
                "name": "\u003c10",
                "product": {
                  "name": "Red Hat Enterprise Linux \u003c10",
                  "product_id": "T053533"
                }
              },
              {
                "category": "product_version",
                "name": "10",
                "product": {
                  "name": "Red Hat Enterprise Linux 10",
                  "product_id": "T053533-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:10"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Enterprise Linux"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-35091",
      "product_status": {
        "known_affected": [
          "2951",
          "67646",
          "T004914",
          "T032255",
          "T053533"
        ]
      },
      "release_date": "2026-05-04T22:00:00.000+00:00",
      "title": "CVE-2026-35091"
    },
    {
      "cve": "CVE-2026-35092",
      "product_status": {
        "known_affected": [
          "2951",
          "67646",
          "T004914",
          "T032255",
          "T053533"
        ]
      },
      "release_date": "2026-05-04T22:00:00.000+00:00",
      "title": "CVE-2026-35092"
    }
  ]
}


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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.