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CVE-2026-81665

🗓️ 04 Sep 2026 09:05:35Reported by redhatType 
cve
 cve
🔗 web.nvd.nist.gov👁 36 Views

Heap overflow in Corosync totempg during fragmented message reassembly causes cluster-wide DoS.

Related
Detection
Affected
Refs
Vulners
Node
OR
redhatenterprise_linuxMatch8appstream
redhatenterprise_linuxMatch8highavailability
redhatenterprise_linuxMatch8resilientstorage
redhatrhel_ausMatch8.4appstream
redhatrhel_ausMatch8.4highavailability
redhatrhel_eus_long_lifeMatch8.4appstream
redhatrhel_eus_long_lifeMatch8.4highavailability
redhatrhel_eus_long_lifeMatch8.4resilientstorage
redhatrhel_ausMatch8.6appstream
redhatrhel_eus_long_lifeMatch8.6appstream
redhatrhel_eus_long_lifeMatch8.6highavailability
redhatrhel_eus_long_lifeMatch8.6resilientstorage
redhatrhel_e4sMatch8.8appstream
redhatrhel_e4sMatch8.8highavailability
redhatrhel_tusMatch8.8appstream
redhatrhel_tusMatch8.8highavailability
redhatenterprise_linuxMatch9appstream
redhatenterprise_linuxMatch9highavailability
redhatenterprise_linuxMatch9resilientstorage
redhatrhel_e4sMatch9.2appstream
redhatrhel_e4sMatch9.2highavailability
redhatrhel_e4sMatch9.2resilientstorage
redhatrhel_e4sMatch9.4appstream
redhatrhel_e4sMatch9.4highavailability
redhatrhel_e4sMatch9.4resilientstorage
redhatrhel_eusMatch9.6appstream
redhatrhel_eusMatch9.6crb
redhatrhel_eusMatch9.6highavailability
redhatrhel_eusMatch9.6resilientstorage
[
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 10",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.10-1.el10_2.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:10.2"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.9-1.el10_0.3",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux_eus:10.0"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:2.4.5-7.el7_9.4",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7::server"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.8-1.el8_10.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:enterprise_linux:8::appstream",
      "cpe:/a:redhat:enterprise_linux:8::crb",
      "cpe:/a:redhat:enterprise_linux:8::highavailability",
      "cpe:/a:redhat:enterprise_linux:8::resilientstorage"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.0-3.el8_4.3",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_aus:8.4::appstream",
      "cpe:/a:redhat:rhel_aus:8.4::highavailability",
      "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream",
      "cpe:/a:redhat:rhel_eus_long_life:8.4::highavailability",
      "cpe:/a:redhat:rhel_eus_long_life:8.4::resilientstorage"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.0-3.el8_4.3",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_aus:8.4::appstream",
      "cpe:/a:redhat:rhel_aus:8.4::highavailability",
      "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream",
      "cpe:/a:redhat:rhel_eus_long_life:8.4::highavailability",
      "cpe:/a:redhat:rhel_eus_long_life:8.4::resilientstorage"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.5-2.el8_6.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_aus:8.6::appstream",
      "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream",
      "cpe:/a:redhat:rhel_eus_long_life:8.6::highavailability",
      "cpe:/a:redhat:rhel_eus_long_life:8.6::resilientstorage"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.5-2.el8_6.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_aus:8.6::appstream",
      "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream",
      "cpe:/a:redhat:rhel_eus_long_life:8.6::highavailability",
      "cpe:/a:redhat:rhel_eus_long_life:8.6::resilientstorage"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.7-1.el8_8.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_e4s:8.8::appstream",
      "cpe:/a:redhat:rhel_e4s:8.8::highavailability",
      "cpe:/a:redhat:rhel_tus:8.8::appstream",
      "cpe:/a:redhat:rhel_tus:8.8::highavailability"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.7-1.el8_8.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_e4s:8.8::appstream",
      "cpe:/a:redhat:rhel_e4s:8.8::highavailability",
      "cpe:/a:redhat:rhel_tus:8.8::appstream",
      "cpe:/a:redhat:rhel_tus:8.8::highavailability"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.10-1.el9_8.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:enterprise_linux:9::appstream",
      "cpe:/a:redhat:enterprise_linux:9::crb",
      "cpe:/a:redhat:enterprise_linux:9::highavailability",
      "cpe:/a:redhat:enterprise_linux:9::resilientstorage"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.7-1.el9_2.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_e4s:9.2::appstream",
      "cpe:/a:redhat:rhel_e4s:9.2::highavailability",
      "cpe:/a:redhat:rhel_e4s:9.2::resilientstorage"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.8-1.el9_4.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_e4s:9.4::appstream",
      "cpe:/a:redhat:rhel_e4s:9.4::highavailability",
      "cpe:/a:redhat:rhel_e4s:9.4::resilientstorage"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "corosync",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:3.1.9-2.el9_6.2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_eus:9.6::appstream",
      "cpe:/a:redhat:rhel_eus:9.6::crb",
      "cpe:/a:redhat:rhel_eus:9.6::highavailability",
      "cpe:/a:redhat:rhel_eus:9.6::resilientstorage"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "openshift/ose-rhel-coreos-9",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "rhcos",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ]
  }
]

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21 Sep 2026 17:19Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.17.5
EPSS0.00349
SSVC
36