Vulnerability-Lookup

ubuntu-cve-2026-3104

Vulnerability from osv_ubuntu

Published

2026-03-25 00:00

Modified

2026-06-30 16:18

Summary

Details

A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-3104	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-3104	REPORT
	https://kb.isc.org/docs/cve-2026-3104	REPORT
	https://ubuntu.com/security/notices/USN-8124-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.3.5-3ubuntu7.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.3.5-3ubuntu7.4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.5-3ubuntu2",
        "4.3.5-3ubuntu3",
        "4.3.5-3ubuntu4",
        "4.3.5-3ubuntu5",
        "4.3.5-3ubuntu6",
        "4.3.5-3ubuntu7",
        "4.3.5-3ubuntu7.1",
        "4.3.5-3ubuntu7.2",
        "4.3.5-3ubuntu7.3",
        "4.3.5-3ubuntu7.4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libbind9-161",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libdns-export1109",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libdns1109",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libirs-export161",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libirs161",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libisc-export1105",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libisc1105",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libisccc-export161",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libisccc161",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libisccfg-export163",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "libisccfg163",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          },
          {
            "binary_name": "liblwres161",
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "bind9-libs",
        "purl": "pkg:deb/ubuntu/bind9-libs@1:9.11.16+dfsg-3~ubuntu1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.11.16+dfsg-3~build1",
        "1:9.11.16+dfsg-3~ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libbind9-161",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libdns-export1110",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libdns1110",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libirs-export161",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libirs161",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libisc-export1105",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libisc1105",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libisccc-export161",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libisccc161",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libisccfg-export163",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "libisccfg163",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          },
          {
            "binary_name": "liblwres161",
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "bind9-libs",
        "purl": "pkg:deb/ubuntu/bind9-libs@1:9.11.19+dfsg-2.1ubuntu3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.11.19+dfsg-2.1ubuntu1",
        "1:9.11.19+dfsg-2.1ubuntu2",
        "1:9.11.19+dfsg-2.1ubuntu3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-keama",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.4.3-P1-4ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.4.3-P1-4ubuntu2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.4.3-P1-2ubuntu5",
        "4.4.3-P1-4ubuntu1",
        "4.4.3-P1-4ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.20.11-1ubuntu2.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.20.11-1ubuntu2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.20.4-3ubuntu1",
        "1:9.20.4-3ubuntu2",
        "1:9.20.4-3ubuntu3",
        "1:9.20.9-2ubuntu1",
        "1:9.20.10-1ubuntu1",
        "1:9.20.11-1ubuntu1",
        "1:9.20.11-1ubuntu2",
        "1:9.20.11-1ubuntu2.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-keama",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.4.3-P1-4ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.4.3-P1-4ubuntu2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.4.3-P1-4ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-keama",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.4.3-P1-4ubuntu2"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.4.3-P1-4ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.4.3-P1-4ubuntu2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.4.3-P1-4ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.",
  "id": "UBUNTU-CVE-2026-3104",
  "modified": "2026-06-30T16:18:34Z",
  "published": "2026-03-25T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3104"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-3104"
    },
    {
      "type": "REPORT",
      "url": "https://kb.isc.org/docs/cve-2026-3104"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8124-1"
    }
  ],
  "related": [
    "USN-8124-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-3104"
  ]
}

CVE-2026-3104 (GCVE-0-2026-3104)

Vulnerability from cvelistv5 – Published: 2026-03-25 13:29 – Updated: 2026-07-15 01:09

Title

Memory leak in code preparing DNSSEC proofs of non-existence

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-772 - Missing Release of Resource after Effective Lifetime

Assigner

isc

References

7 references

URL	Tags
https://kb.isc.org/docs/cve-2026-3104	vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.21	patch
https://downloads.isc.org/isc/bind9/9.21.20	patch
https://access.redhat.com/security/cve/CVE-2026-3104	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2451310	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:6935	vendor-advisoryx_refsource_REDHAT

Impacted products

8 products

Vendor	Product	Version
ISC	BIND 9	Affected: 9.20.0 , ≤ 9.20.20 (custom) Affected: 9.21.0 , ≤ 9.21.19 (custom) Affected: 9.20.9-S1 , ≤ 9.20.20-S1 (custom) Unaffected: 9.18.0 , ≤ 9.18.46 (custom) Unaffected: 9.18.11-S1 , ≤ 9.18.46-S1 (custom)
Red Hat	Red Hat Hardened Images	Unaffected: 9.18.48-1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-03-25 00:00

Credits

ISC would like to thank Vitaly Simonovich for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3104",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-25T14:56:20.362810Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-25T14:56:26.373Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      },
      {
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            "cpes": [
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            "packageName": "bind-main",
            "product": "Red Hat Hardened Images",
            "vendor": "Red Hat",
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                "versionType": "rpm"
              }
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            "cpes": [
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            "vendor": "Red Hat"
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            "cpes": [
              "cpe:/o:redhat:enterprise_linux:6"
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            "defaultStatus": "unaffected",
            "packageName": "bind",
            "product": "Red Hat Enterprise Linux 6",
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            "cpes": [
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            "packageName": "bind",
            "product": "Red Hat Enterprise Linux 7",
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            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat"
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            "cpes": [
              "cpe:/o:redhat:enterprise_linux:8"
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            "defaultStatus": "unaffected",
            "packageName": "bind9.16",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat"
          },
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            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "unaffected",
            "packageName": "bind",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "unaffected",
            "packageName": "bind9.18",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
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            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "unaffected",
            "packageName": "dhcp",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:openshift:4"
            ],
            "defaultStatus": "unaffected",
            "packageName": "rhcos",
            "product": "Red Hat OpenShift Container Platform 4",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-03-25T13:29:19.494Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in the BIND resolver. A remote attacker can exploit this vulnerability by querying a specially crafted domain, which causes a memory leak. This memory leak can lead to a Denial of Service (DoS) condition, making the BIND resolver unavailable to legitimate users."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-772",
                "description": "Missing Release of Resource after Effective Lifetime",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-15T01:09:38.243Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-3104"
          },
          {
            "name": "RHBZ#2451310",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451310"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3104.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:6935"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:6935: Red Hat Hardened Images"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-03-25T14:02:15.067Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-03-25T13:29:19.494Z",
            "value": "Made public."
          }
        ],
        "title": "bind: BIND: Denial of Service via specially crafted domain query causing a memory leak",
        "workarounds": [
          {
            "lang": "en",
            "value": "To mitigate this issue, restrict access to the BIND resolver to trusted clients only. This can be achieved by configuring firewall rules to limit inbound connections to port 53 (UDP/TCP) from known, authorized IP addresses or networks. Alternatively, configure BIND to listen only on specific trusted interfaces or localhost.\n\nExample using firewalld:\n`firewall-cmd --permanent --add-rich-rule=\u0027rule family=\"ipv4\" source address=\"\u003cTRUSTED_IP_OR_NETWORK\u003e\" port port=53 protocol=\"udp\" accept\u0027`\n`firewall-cmd --permanent --add-rich-rule=\u0027rule family=\"ipv4\" source address=\"\u003cTRUSTED_IP_OR_NETWORK\u003e\" port port=53 protocol=\"tcp\" accept\u0027`\n`firewall-cmd --reload`\n\nAfter applying changes, a restart of the BIND service may be required for the new configuration to take full effect. This may temporarily interrupt DNS resolution services."
          }
        ],
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "BIND 9",
          "vendor": "ISC",
          "versions": [
            {
              "lessThanOrEqual": "9.20.20",
              "status": "affected",
              "version": "9.20.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.21.19",
              "status": "affected",
              "version": "9.21.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.20.20-S1",
              "status": "affected",
              "version": "9.20.9-S1",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.18.46",
              "status": "unaffected",
              "version": "9.18.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.18.46-S1",
              "status": "unaffected",
              "version": "9.18.11-S1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "9.20.20",
                  "versionStartIncluding": "9.20.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "9.21.19",
                  "versionStartIncluding": "9.21.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "9.20.20-S1",
                  "versionStartIncluding": "9.20.9-S1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "9.18.46",
                  "versionStartIncluding": "9.18.0",
                  "vulnerable": false
                },
                {
                  "criteria": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "9.18.46-S1",
                  "versionStartIncluding": "9.18.11-S1",
                  "vulnerable": false
                }
              ],
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Vitaly Simonovich for bringing this vulnerability to our attention."
        }
      ],
      "datePublic": "2026-03-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1.\nBIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "We are not aware of any active exploits."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "If a BIND resolver is asked to query a specially crafted domain, memory will not be recovered by `named`. This can cause unbounded growth of Resident Set Size (RSS) memory, which may lead to an out-of-memory condition. Additionally, `named` will exit with an assertion failure if a shutdown or reload is attempted."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-772",
              "description": "CWE-772 Missing Release of Resource after Effective Lifetime",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T13:29:19.494Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
      },
      "references": [
        {
          "name": "CVE-2026-3104",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://kb.isc.org/docs/cve-2026-3104"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://downloads.isc.org/isc/bind9/9.20.21"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://downloads.isc.org/isc/bind9/9.21.20"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.20.21, 9.21.20, or 9.20.21-S1."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Memory leak in code preparing DNSSEC proofs of non-existence",
      "workarounds": [
        {
          "lang": "en",
          "value": "No workarounds known."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
    "assignerShortName": "isc",
    "cveId": "CVE-2026-3104",
    "datePublished": "2026-03-25T13:29:19.494Z",
    "dateReserved": "2026-02-24T10:04:57.917Z",
    "dateUpdated": "2026-07-15T01:09:38.243Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

usn-8124-1

Vulnerability from osv_ubuntu

Published

2026-03-25 16:32

Modified

2026-06-30 15:54

Summary

bind9 vulnerabilities

Details

Samy Medjahed discovered that Bind incorrectly handled insecure delegation validation. A remote attacker could possibly use this issue to cause excessive NSEC3 iterations, consuming CPU resources, and leading to a denial of service. (CVE-2026-1519)

Vitaly Simonovich discovered that Bind incorrectly handled memory when preparing DNSSEC proofs of non-existence. A remote attacker could possibly use this issue to cause memory consumption, leading to a denial of service. This issue only affected Ubuntu 25.10. (CVE-2026-3104)

Vitaly Simonovich discovered that Bind incorrectly handled authenticated queries containing TKEY records. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. This issue only affected Ubuntu 25.10. (CVE-2026-3119)

It was discovered that Bind incorrectly handled DNS queries signed with SIG(0). A remote attacker could possibly use this issue to bypass ACLs. This issue only affected Ubuntu 25.10. (CVE-2026-3591)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8124-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-1519	REPORT
	https://ubuntu.com/security/CVE-2026-3104	REPORT
	https://ubuntu.com/security/CVE-2026-3119	REPORT
	https://ubuntu.com/security/CVE-2026-3591	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-1519",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.39-0ubuntu0.22.04.3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.39-0ubuntu0.22.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.16.15-1ubuntu1",
        "1:9.16.15-1ubuntu2",
        "1:9.16.15-1ubuntu3",
        "1:9.18.0-2ubuntu1",
        "1:9.18.0-2ubuntu2",
        "1:9.18.0-2ubuntu3",
        "1:9.18.1-1ubuntu1",
        "1:9.18.1-1ubuntu1.1",
        "1:9.18.1-1ubuntu1.2",
        "1:9.18.1-1ubuntu1.3",
        "1:9.18.12-0ubuntu0.22.04.1",
        "1:9.18.12-0ubuntu0.22.04.2",
        "1:9.18.12-0ubuntu0.22.04.3",
        "1:9.18.18-0ubuntu0.22.04.1",
        "1:9.18.18-0ubuntu0.22.04.2",
        "1:9.18.24-0ubuntu0.22.04.1",
        "1:9.18.28-0ubuntu0.22.04.1",
        "1:9.18.30-0ubuntu0.22.04.1",
        "1:9.18.30-0ubuntu0.22.04.2",
        "1:9.18.39-0ubuntu0.22.04.1",
        "1:9.18.39-0ubuntu0.22.04.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-1519",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.3"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.3"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.3"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.3"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.3"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.3"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.39-0ubuntu0.24.04.3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.39-0ubuntu0.24.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.18.18-0ubuntu2",
        "1:9.18.21-0ubuntu1",
        "1:9.18.24-0ubuntu3",
        "1:9.18.24-0ubuntu4",
        "1:9.18.24-0ubuntu5",
        "1:9.18.28-0ubuntu0.24.04.1",
        "1:9.18.30-0ubuntu0.24.04.1",
        "1:9.18.30-0ubuntu0.24.04.2",
        "1:9.18.39-0ubuntu0.24.04.1",
        "1:9.18.39-0ubuntu0.24.04.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-1519",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-3104",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-3119",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-3591",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.20.11-1ubuntu2.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.20.11-1ubuntu2.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.20.11-1ubuntu2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.20.4-3ubuntu1",
        "1:9.20.4-3ubuntu2",
        "1:9.20.4-3ubuntu3",
        "1:9.20.9-2ubuntu1",
        "1:9.20.10-1ubuntu1",
        "1:9.20.11-1ubuntu1",
        "1:9.20.11-1ubuntu2",
        "1:9.20.11-1ubuntu2.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Samy Medjahed discovered that Bind incorrectly handled insecure\ndelegation validation. A remote attacker could possibly use this issue to\ncause excessive NSEC3 iterations, consuming CPU resources, and leading to a\ndenial of service. (CVE-2026-1519)\n\nVitaly Simonovich discovered that Bind incorrectly handled memory when\npreparing DNSSEC proofs of non-existence. A remote attacker could possibly\nuse this issue to cause memory consumption, leading to a denial of service.\nThis issue only affected Ubuntu 25.10. (CVE-2026-3104)\n\nVitaly Simonovich discovered that Bind incorrectly handled authenticated\nqueries containing TKEY records. A remote attacker could possibly use this\nissue to cause Bind to crash, resulting in a denial of service. This issue\nonly affected Ubuntu 25.10. (CVE-2026-3119)\n\nIt was discovered that Bind incorrectly handled DNS queries signed with\nSIG(0). A remote attacker could possibly use this issue to bypass ACLs.\nThis issue only affected Ubuntu 25.10. (CVE-2026-3591)",
  "id": "USN-8124-1",
  "modified": "2026-06-30T15:54:54Z",
  "published": "2026-03-25T16:32:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8124-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-1519"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3104"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3119"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3591"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "bind9 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-1519",
    "UBUNTU-CVE-2026-3104",
    "UBUNTU-CVE-2026-3119",
    "UBUNTU-CVE-2026-3591"
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

ubuntu-cve-2026-3104

Vulnerability from osv_ubuntu

CVE-2026-3104 (GCVE-0-2026-3104)

usn-8124-1

Vulnerability from osv_ubuntu

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Sightings

Nomenclature