Vulnerability-Lookup

CVE-2026-11605 (GCVE-0-2026-11605)

Vulnerability from cvelistv5 – Published: 2026-07-22 14:11 – Updated: 2026-07-22 18:53

Title

Unnecessary validation of DNSSEC signed records

Summary

The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time. This issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 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 18:53 UTC

CWE

CWE-408 - Incorrect Behavior Order - Early Amplification

Assigner

isc CNA under the mitre root

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

References

3 references

URL	Tags
https://kb.isc.org/docs/cve-2026-11605	vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.26	patch
https://downloads.isc.org/isc/bind9/9.21.24	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
ISC	BIND 9	Affected: 9.20.0 , ≤ 9.20.24 (custom) Affected: 9.21.0 , ≤ 9.21.23 (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::::::::

Date Public

2026-07-22 00:00

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-11605

Vulnerability from fkie_nvd - Published: 2026-07-22 15:16 - Updated: 2026-10-24 18:10

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security-officer@isc.org	https://downloads.isc.org/isc/bind9/9.20.26
	security-officer@isc.org	https://downloads.isc.org/isc/bind9/9.21.24
	security-officer@isc.org	https://kb.isc.org/docs/cve-2026-11605

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-22T18:53:47.681873Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-22T15:16:51.573",
  "references": [
    {
      "source": "security-officer@isc.org",
      "url": "https://downloads.isc.org/isc/bind9/9.20.26"
    },
    {
      "source": "security-officer@isc.org",
      "url": "https://downloads.isc.org/isc/bind9/9.21.24"
    },
    {
      "source": "security-officer@isc.org",
      "url": "https://kb.isc.org/docs/cve-2026-11605"
    }
  ],
  "sourceIdentifier": "security-officer@isc.org",
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-408"
        }
      ],
      "source": "security-officer@isc.org",
      "type": "Secondary"
    }
  ]
}

GHSA-QHH7-J7W3-XFXQ

Vulnerability from github – Published: 2026-07-22 15:31 – Updated: 2026-07-22 15:31

Details

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-11605"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-408"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-22T15:16:51Z",
    "severity": "HIGH"
  },
  "details": "The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, and 9.20.9-S1 through 9.20.24-S1.",
  "id": "GHSA-qhh7-j7w3-xfxq",
  "modified": "2026-07-22T15:31:26Z",
  "published": "2026-07-22T15:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11605"
    },
    {
      "type": "WEB",
      "url": "https://downloads.isc.org/isc/bind9/9.20.26"
    },
    {
      "type": "WEB",
      "url": "https://downloads.isc.org/isc/bind9/9.21.24"
    },
    {
      "type": "WEB",
      "url": "https://kb.isc.org/docs/cve-2026-11605"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

OESA-2026-3290 (CVE-2026-10723)

Vulnerability from osv_openeuler – Published: 2026-08-07 02:44 – Updated: 2026-08-07 02:44 – Source website

Summary

bind security update

Details

BIND (Berkeley Internet Name Domain) is an implementation of the DNS (Domain Name System) protocols. BIND includes a DNS server (named), which resolves host names to IP addresses; a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating properly.

Security Fix(es):

BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-10723)

If BIND encounters a particular invalid data structure in a DNS record, it will accept the invalid data, and may subsequently abort and exit.

BIND will first need to store a DNS record for a key (KEY, DNSKEY, etc.). That key must specify a PRIVATEDNS algorithm (253), and in the algorithm identifier, improperly give a length longer than the actual identifier data. The invalid identifier will be stored. If BIND later needs to render that record to text, it will use the invalid length during processing, leading to a consistency check failing. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-10822)

An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing. This is not handled correctly and may lead to defeating the RPZ rule. It also may lead to an unexpected exit of the BIND 9 software. This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-11331)

A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the max-cache-size parameter. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-11622)

It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes named to produce a wildcard name for a zone that is shorter than the attacker's zone, which can result in cache poisoning. For this attack to have any effect, the resolver under attack must have set synth-from-dnssec yes; (which is the default). This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-11721)

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.(CVE-2026-12617)

If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-13204)

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-13321)

Severity

8.6 (High)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-10723	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-10822	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-11331	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-11605	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-11622	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-11721	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-12617	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-13204	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-13321	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "bind-9.20.21-4.oe2403sp4.aarch64.rpm",
          "bind-chroot-9.20.21-4.oe2403sp4.aarch64.rpm",
          "bind-debuginfo-9.20.21-4.oe2403sp4.aarch64.rpm",
          "bind-debugsource-9.20.21-4.oe2403sp4.aarch64.rpm",
          "bind-devel-9.20.21-4.oe2403sp4.aarch64.rpm",
          "bind-dnssec-utils-9.20.21-4.oe2403sp4.aarch64.rpm",
          "bind-libs-9.20.21-4.oe2403sp4.aarch64.rpm",
          "bind-utils-9.20.21-4.oe2403sp4.aarch64.rpm"
        ],
        "noarch": [
          "bind-dnssec-doc-9.20.21-4.oe2403sp4.noarch.rpm",
          "bind-license-9.20.21-4.oe2403sp4.noarch.rpm"
        ],
        "src": [
          "bind-9.20.21-4.oe2403sp4.src.rpm"
        ],
        "x86_64": [
          "bind-9.20.21-4.oe2403sp4.x86_64.rpm",
          "bind-chroot-9.20.21-4.oe2403sp4.x86_64.rpm",
          "bind-debuginfo-9.20.21-4.oe2403sp4.x86_64.rpm",
          "bind-debugsource-9.20.21-4.oe2403sp4.x86_64.rpm",
          "bind-devel-9.20.21-4.oe2403sp4.x86_64.rpm",
          "bind-dnssec-utils-9.20.21-4.oe2403sp4.x86_64.rpm",
          "bind-libs-9.20.21-4.oe2403sp4.x86_64.rpm",
          "bind-utils-9.20.21-4.oe2403sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "bind",
        "purl": "pkg:rpm/openEuler/bind\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.20.21-4.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "BIND (Berkeley Internet Name Domain) is an implementation of the DNS (Domain Name System) protocols. BIND includes a DNS server (named), which resolves host names to IP addresses; a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating properly.\r\n\r\nSecurity Fix(es):\n\nBIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses.\nThis issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-10723)\n\nIf BIND encounters a particular invalid data structure in a DNS record, it will accept the invalid data, and may subsequently abort and exit.\n\nBIND will first need to store a DNS record for a key (KEY, DNSKEY, etc.). That key must specify a PRIVATEDNS algorithm (253), and in the algorithm identifier, improperly give a length longer than the actual identifier data. The invalid identifier will be stored. If BIND later needs to render that record to text, it will use the invalid length during processing, leading to a consistency check failing.\nThis issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-10822)\n\nAn attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing. This is not handled correctly and may lead to defeating the RPZ rule. It also may lead to an unexpected exit of the BIND 9 software.\nThis issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-11331)\n\nThe issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-11605)\n\nA DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the `max-cache-size` parameter.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-11622)\n\nIt is possible for an attacker\u0026apos;s zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes `named` to produce a wildcard name for a zone that is shorter than the attacker\u0026apos;s zone, which can result in cache poisoning. For this attack to have any effect, the resolver under attack must have set `synth-from-dnssec yes;` (which is the default).\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-11721)\n\nThe 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.\nThis 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.(CVE-2026-12617)\n\nIf a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-13204)\n\nThe BIND resolver accepts validly-signed NSEC records where the \u0026quot;Next Domain Name\u0026quot; field points outside the signer\u0026apos;s zone.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.(CVE-2026-13321)",
  "id": "OESA-2026-3290",
  "modified": "2026-08-07T02:44:23Z",
  "published": "2026-08-07T02:44:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3290"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10723"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10822"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11331"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11605"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11622"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11721"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12617"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13204"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13321"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "bind security update",
  "upstream": [
    "CVE-2026-10723",
    "CVE-2026-10822",
    "CVE-2026-11331",
    "CVE-2026-11605",
    "CVE-2026-11622",
    "CVE-2026-11721",
    "CVE-2026-12617",
    "CVE-2026-13204",
    "CVE-2026-13321"
  ]
}

OPENSUSE-SU-2026:11375-1

Vulnerability from csaf_opensuse - Published: 2026-07-26 00:00 - Updated: 2026-09-17 17:16

Summary

bind-9.20.26-1.1 on GA media

Severity

Moderate

Scope

9 vulnerabilities in this advisory, including CVE-2026-11605.

CVE-2026-11605

7.5 (High)


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

Recommended: 36 products

Open the full advisory

OPENSUSE-SU-2026:21489-1

Vulnerability from csaf_opensuse - Published: 2026-07-30 10:43 - Updated: 2026-09-17 17:40

Summary

Security update for bind

Severity

Important

Scope

9 vulnerabilities in this advisory, including CVE-2026-11605.

CVE-2026-11605

7.5 (High)


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

Recommended: 33 products

Open the full advisory

RHSA-2026:42853

Vulnerability from csaf_redhat - Published: 2026-07-21 14:37 - Updated: 2026-10-22 06:02

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2026-11605.

CVE-2026-11605

7.5 (High)


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

Fixed: 15 products

https://access.redhat.com/errata/RHSA-2026:42853

Open the full advisory

UBUNTU-CVE-2026-11605 (CVE-2026-11605)

Vulnerability from osv_ubuntu – Published: 2026-07-22 15:16 – Updated: 2026-08-19 16:13 – Source website

Details

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-2026-11605	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-11605	REPORT
	https://kb.isc.org/docs/cve-2026-11605	REPORT
	https://ubuntu.com/security/notices/USN-8648-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "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"
      ]
    }
  ],
  "aliases": [],
  "details": "The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time. This issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, and 9.20.9-S1 through 9.20.24-S1.",
  "id": "UBUNTU-CVE-2026-11605",
  "modified": "2026-08-19T16:13:16Z",
  "published": "2026-07-22T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-11605"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-11605"
    },
    {
      "type": "REPORT",
      "url": "https://kb.isc.org/docs/cve-2026-11605"
    },
    {
      "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-2026-11605"
  ]
}

WID-SEC-W-2026-2484

Vulnerability from csaf_certbund - Published: 2026-07-22 22:00 - Updated: 2026-08-31 22:00

Summary

Internet Systems Consortium BIND: Mehrere Schwachstellen

Severity

Hoch

Scope

9 vulnerabilities in this advisory, including CVE-2026-11605.

CVE-2026-11605

Known affected: 13 products

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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

Sightings and recorded dates, grouped by day · UTC

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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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CVE-2026-11605 (GCVE-0-2026-11605)

FKIE_CVE-2026-11605

GHSA-QHH7-J7W3-XFXQ

OESA-2026-3290 (CVE-2026-10723)

OPENSUSE-SU-2026:11375-1

OPENSUSE-SU-2026:21489-1

RHSA-2026:42853

UBUNTU-CVE-2026-11605 (CVE-2026-11605)

WID-SEC-W-2026-2484

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Nomenclature

Vulnerability timeline

Related by attack behaviour