Vulnerability-Lookup

UBUNTU-CVE-2026-12617 (CVE-2026-12617)

Vulnerability from osv_ubuntu – Published: 2026-07-22 15:16 – Updated: 2026-10-12 17:29 – Source website

Details

The issue is unexpected program termination based on ordering and/or specific content in responses to queries for CNAME or DNAME, and A records. Specifically, if a client queries for a DNAME and A record below the DNAME to the resolver, and the authoritative server responds positively to the A query but delays the DNAME response and later responds negatively, named may quit unexpectedly. Or, if a client queries for a CNAME and A record for the same name to the resolver, and the authoritative server responds positively to the A query but delays the CNAME response and later responds with a self-referential CNAME, the same failure may occur. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Severity

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-2026-12617	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-12617	REPORT
	https://kb.isc.org/docs/cve-2026-12617	REPORT
	https://ubuntu.com/security/notices/USN-8648-1	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": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.39-0ubuntu0.22.04.5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.39-0ubuntu0.22.04.5"
            }
          ],
          "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",
        "1:9.18.39-0ubuntu0.22.04.3",
        "1:9.18.39-0ubuntu0.22.04.4"
      ]
    },
    {
      "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": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.6"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.6"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.6"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.6"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.6"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.6"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.39-0ubuntu0.24.04.6?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.39-0ubuntu0.24.04.6"
            }
          ],
          "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",
        "1:9.18.39-0ubuntu0.24.04.3",
        "1:9.18.39-0ubuntu0.24.04.5"
      ]
    },
    {
      "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": "1:9.20.24-1ubuntu0.2"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.20.24-1ubuntu0.2"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.20.24-1ubuntu0.2"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.20.24-1ubuntu0.2"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.20.24-1ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.20.24-1ubuntu0.2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.20.24-1ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.20.11-1ubuntu2",
        "1:9.20.11-1ubuntu3",
        "1:9.20.18-1ubuntu1",
        "1:9.20.18-1ubuntu2",
        "1:9.20.18-1ubuntu2.1",
        "1:9.20.24-1ubuntu0.1"
      ]
    },
    {
      "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: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": "The issue is unexpected program termination based on ordering and/or specific content in responses to queries for CNAME or DNAME, and A records. Specifically, if a client queries for a DNAME and A record below the DNAME to the resolver, and the authoritative server responds positively to the A query but delays the DNAME response and later responds negatively, `named` may quit unexpectedly. Or, if a client queries for a CNAME and A record for the same name to the resolver, and the authoritative server responds positively to the A query but delays the CNAME response and later responds with a self-referential CNAME, the same failure may occur. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.",
  "id": "UBUNTU-CVE-2026-12617",
  "modified": "2026-10-12T17:29:24Z",
  "published": "2026-07-22T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-12617"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-12617"
    },
    {
      "type": "REPORT",
      "url": "https://kb.isc.org/docs/cve-2026-12617"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8648-1"
    }
  ],
  "related": [
    "USN-8648-1"
  ],
  "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": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-12617"
  ]
}

CVE-2026-12617 (GCVE-0-2026-12617)

Vulnerability from cvelistv5 – Published: 2026-07-22 14:14 – Updated: 2026-07-22 18:48

Title

Record ordering based unexpected exit with CNAME or DNAME

Summary

The issue is unexpected program termination based on ordering and/or specific content in responses to queries for CNAME or DNAME, and A records. Specifically, if a client queries for a DNAME and A record below the DNAME to the resolver, and the authoritative server responds positively to the A query but delays the DNAME response and later responds negatively, `named` may quit unexpectedly. Or, if a client queries for a CNAME and A record for the same name to the resolver, and the authoritative server responds positively to the A query but delays the CNAME response and later responds with a self-referential CNAME, the same failure may occur. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

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 · CISA-ADP (v2.0.3)

Decision recorded 2026-07-22 18:48 UTC

CWE

CWE-617 - Reachable Assertion

Assigner

isc CNA under the mitre root

CNA scorecard A 95/100 over 33 records in the last 180 days details

References

2 references

URL	Tags
https://kb.isc.org/docs/cve-2026-12617	vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.26	patch

Impacted products

1 product

Vendor	Product	Version
ISC	BIND 9	Affected: 9.18.0 , ≤ 9.18.50 (custom) Affected: 9.20.0 , ≤ 9.20.24 (custom) Affected: 9.18.11-S1 , ≤ 9.18.50-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.24-S1 (custom) cpe:2.3:a:isc:bind:::::::: cpe:2.3:a:isc:bind:::::::: cpe:2.3:a:isc:bind:::::::: cpe:2.3:a:isc:bind::::::::

Date Public

2026-07-22 00:00

Credits

ISC would like to thank Qifan Zhang of Palo Alto Networks for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-12617",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-22T18:48:06.430818Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-22T18:48:15.278Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "BIND 9",
          "vendor": "ISC",
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      "source": {
        "discovery": "EXTERNAL"
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      "title": "Record ordering based unexpected exit with CNAME or DNAME",
      "workarounds": [
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    "dateReserved": "2026-06-18T13:52:43.335Z",
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}

USN-8648-1 (UBUNTU-CVE-2026-10723)

Vulnerability from osv_ubuntu – Published: 2026-08-19 11:45 – Updated: 2026-08-19 11:45 – Source website

Summary

bind9 vulnerabilities

Details

It was discovered that Bind incorrectly accepted NSEC3 records whose signer name did not match the owning zone. A remote attacker could possibly use this issue to perform NSEC3 impersonation attacks, bypassing DNSSEC validation. (CVE-2026-10723)

It was discovered that Bind incorrectly handled Key Records using the PRIVATEDNS algorithm. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. (CVE-2026-10822)

It was discovered that Bind incorrectly handled wildcard CNAME expansion in Response Policy Zones. A remote attacker could possibly use this issue to bypass configured RPZ policies. (CVE-2026-11331)

It was discovered that Bind performed unnecessary validation of DNSSEC signed records. A remote attacker could possibly use this issue to cause Bind to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-11605)

It was discovered that Bind incorrectly tracked memory usage in the DNS cache. A remote attacker could possibly use this issue to cause Bind to use memory beyond configured limits, leading to a denial of service. (CVE-2026-11622)

It was discovered that Bind incorrectly handled signed wildcard records with label count discrepancies and RRSIG validation. A remote attacker could possibly use this issue to perform cache poisoning attacks. (CVE-2026-11721)

It was discovered that Bind incorrectly handled certain CNAME and DNAME record orderings in the resolver. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. (CVE-2026-12617)

It was discovered that Bind incorrectly validated out-of-zone NSEC next owner names during DNSSEC validation. A remote attacker could possibly use this issue to bypass DNSSEC validation. (CVE-2026-13321)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8648-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-10723	REPORT
	https://ubuntu.com/security/CVE-2026-10822	REPORT
	https://ubuntu.com/security/CVE-2026-11331	REPORT
	https://ubuntu.com/security/CVE-2026-11605	REPORT
	https://ubuntu.com/security/CVE-2026-11622	REPORT
	https://ubuntu.com/security/CVE-2026-11721	REPORT
	https://ubuntu.com/security/CVE-2026-12617	REPORT
	https://ubuntu.com/security/CVE-2026-13321	REPORT

JSON

To clipboard

{
  "affected": [
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              "id": "CVE-2026-10723",
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                },
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                  "type": "Ubuntu"
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  ],
  "aliases": [],
  "details": "It was discovered that Bind incorrectly accepted NSEC3 records whose signer\nname did not match the owning zone. A remote attacker could possibly use\nthis issue to perform NSEC3 impersonation attacks, bypassing DNSSEC\nvalidation. (CVE-2026-10723)\n\nIt was discovered that Bind incorrectly handled Key Records using the\nPRIVATEDNS algorithm. A remote attacker could possibly use this issue to\ncause Bind to crash, resulting in a denial of service. (CVE-2026-10822)\n\nIt was discovered that Bind incorrectly handled wildcard CNAME expansion in\nResponse Policy Zones. A remote attacker could possibly use this issue to\nbypass configured RPZ policies. (CVE-2026-11331)\n\nIt was discovered that Bind performed unnecessary validation of DNSSEC\nsigned records. A remote attacker could possibly use this issue to cause\nBind to use excessive resources, leading to a denial of service. This issue\nonly affected Ubuntu 26.04 LTS. (CVE-2026-11605)\n\nIt was discovered that Bind incorrectly tracked memory usage in the DNS\ncache. A remote attacker could possibly use this issue to cause Bind to use\nmemory beyond configured limits, leading to a denial of service.\n(CVE-2026-11622)\n\nIt was discovered that Bind incorrectly handled signed wildcard records\nwith label count discrepancies and RRSIG validation. A remote attacker\ncould possibly use this issue to perform cache poisoning attacks.\n(CVE-2026-11721)\n\nIt was discovered that Bind incorrectly handled certain CNAME and DNAME\nrecord orderings in the resolver. A remote attacker could possibly use this\nissue to cause Bind to crash, resulting in a denial of service.\n(CVE-2026-12617)\n\nIt was discovered that Bind incorrectly validated out-of-zone NSEC next\nowner names during DNSSEC validation. A remote attacker could possibly use\nthis issue to bypass DNSSEC validation. (CVE-2026-13321)",
  "id": "USN-8648-1",
  "modified": "2026-08-19T11:45:39Z",
  "published": "2026-08-19T11:45:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8648-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-10723"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-10822"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-11331"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-11605"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-11622"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-11721"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-12617"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-13321"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "bind9 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-10723",
    "UBUNTU-CVE-2026-10822",
    "UBUNTU-CVE-2026-11331",
    "UBUNTU-CVE-2026-11605",
    "UBUNTU-CVE-2026-11622",
    "UBUNTU-CVE-2026-11721",
    "UBUNTU-CVE-2026-12617",
    "UBUNTU-CVE-2026-13321"
  ]
}

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.

Vulnerability timeline

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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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UBUNTU-CVE-2026-12617 (CVE-2026-12617)

CVE-2026-12617 (GCVE-0-2026-12617)

USN-8648-1 (UBUNTU-CVE-2026-10723)

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Related by attack behaviour