Vulnerability-Lookup

RHSA-2026:75578

Vulnerability from csaf_opensuse - Published: 2026-10-05 00:00 - Updated: 2026-10-07 08:32

Summary

security update for bind9.18

Severity

Important

Notes

Title of the patch: security update for bind9.18

Description of the patch: This security update provides a functional equivalent of RHSA-2026:75578. The original Red Hat(R) advisory is available from the Red Hat web site at https://access.redhat.com/errata/RHSA-2026:75578.

Patchnames: RHSA-2026:75578

CVE-2026-19666

7.5 (High)


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

Affected products

Recommended 9 products

Product	Version	Remediation
Unresolved product id: SUSE Liberty Linux 9:bind9.18-32:9.18.29-14.el9_8.10.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:bind9.18-chroot-32:9.18.29-14.el9_8.10.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:bind9.18-devel-32:9.18.29-14.el9_8.10.i686	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:bind9.18-devel-32:9.18.29-14.el9_8.10.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:bind9.18-dnssec-utils-32:9.18.29-14.el9_8.10.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:bind9.18-doc-32:9.18.29-14.el9_8.10.noarch	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:bind9.18-libs-32:9.18.29-14.el9_8.10.i686	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:bind9.18-libs-32:9.18.29-14.el9_8.10.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:bind9.18-utils-32:9.18.29-14.el9_8.10.x86_64	—	Vendor Fix

Threats

Impact important

CVE-2026-19667

7.5 (High)


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

Affected products

Recommended 9 products, the same list as for CVE-2026-19666

Threats

Impact important

CVE-2026-80274

7.5 (High)


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

Affected products

Recommended 9 products, the same list as for CVE-2026-19666

Threats

Impact important

CVE-2026-81563

7.5 (High)


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

Affected products

Recommended 9 products, the same list as for CVE-2026-19666

Threats

Impact important

CVE-2026-81736

7.5 (High)


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

Affected products

Recommended 9 products, the same list as for CVE-2026-19666

Threats

Impact important

References

19 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/r…	self
https://lists.suse.com/pipermail/suse-liberty-lin…	self
https://lists.suse.com/pipermail/suse-liberty-lin…	self
https://www.suse.com/security/cve/CVE-2026-19666/	self
https://www.suse.com/security/cve/CVE-2026-19667/	self
https://www.suse.com/security/cve/CVE-2026-80274/	self
https://www.suse.com/security/cve/CVE-2026-81563/	self
https://www.suse.com/security/cve/CVE-2026-81736/	self
https://www.suse.com/security/cve/CVE-2026-19666	external
https://bugzilla.suse.com/1280433	external
https://www.suse.com/security/cve/CVE-2026-19667	external
https://bugzilla.suse.com/1280435	external
https://www.suse.com/security/cve/CVE-2026-80274	external
https://bugzilla.suse.com/1280443	external
https://www.suse.com/security/cve/CVE-2026-81563	external
https://bugzilla.suse.com/1280444	external
https://www.suse.com/security/cve/CVE-2026-81736	external
https://bugzilla.suse.com/1280445	external

JSON

To clipboard

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        {
          "category": "general",
          "text": "On a resolver configured to use ``dns64``, if an applicable answer from the authoritative server is malformed in a specific way, the resolver `named` process will exit unexpectedly.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.",
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      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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            "version": "3.1"
          },
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            "SUSE Liberty Linux 9:bind9.18-devel-32:9.18.29-14.el9_8.10.x86_64",
            "SUSE Liberty Linux 9:bind9.18-dnssec-utils-32:9.18.29-14.el9_8.10.x86_64",
            "SUSE Liberty Linux 9:bind9.18-doc-32:9.18.29-14.el9_8.10.noarch",
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            "SUSE Liberty Linux 9:bind9.18-utils-32:9.18.29-14.el9_8.10.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-10-05T00:00:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-19666"
    },
    {
      "cve": "CVE-2026-19667",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-19667"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in `named` results in a negative cache entry of 0 bytes. When this entry is subsequently read, `named` aborts.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-19667",
          "url": "https://www.suse.com/security/cve/CVE-2026-19667"
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        {
          "category": "external",
          "summary": "SUSE Bug 1280435 for CVE-2026-19667",
          "url": "https://bugzilla.suse.com/1280435"
        }
      ],
      "remediations": [
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      "threats": [
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          "category": "impact",
          "date": "2026-10-05T00:00:00Z",
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      ],
      "title": "CVE-2026-19667"
    },
    {
      "cve": "CVE-2026-80274",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-80274"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "If a BIND resolver sends a query for a DNSSEC-signed authoritative zone, and the authoritative server replies with a valid wildcard answer and signed NSEC3 proof, followed by an unsigned NSEC at the same owner name, it will trigger an unexpected program exit.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.",
          "title": "CVE description"
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      "references": [
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          "category": "external",
          "summary": "CVE-2026-80274",
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        {
          "category": "external",
          "summary": "SUSE Bug 1280443 for CVE-2026-80274",
          "url": "https://bugzilla.suse.com/1280443"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Liberty Linux 9:bind9.18-32:9.18.29-14.el9_8.10.x86_64",
            "SUSE Liberty Linux 9:bind9.18-chroot-32:9.18.29-14.el9_8.10.x86_64",
            "SUSE Liberty Linux 9:bind9.18-devel-32:9.18.29-14.el9_8.10.i686",
            "SUSE Liberty Linux 9:bind9.18-devel-32:9.18.29-14.el9_8.10.x86_64",
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            "SUSE Liberty Linux 9:bind9.18-utils-32:9.18.29-14.el9_8.10.x86_64"
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        }
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            "SUSE Liberty Linux 9:bind9.18-dnssec-utils-32:9.18.29-14.el9_8.10.x86_64",
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          "text": "https://www.suse.com/security/cve/CVE-2026-81563"
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        {
          "category": "general",
          "text": "A BIND resolver encountering an SVCB/HTTPS AliasMode record referencing 14 or more SVCB/HTTPS ServiceMode records may fail to properly deallocate internal resources. If this happens repeatedly, resource exhaustion will eventually prevent the resolver from performing new recursive lookups.\nThis issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.",
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        {
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          "text": "https://www.suse.com/security/cve/CVE-2026-81736"
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        {
          "category": "general",
          "text": "If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response.\nThis issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.",
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          "product_ids": [
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            "SUSE Liberty Linux 9:bind9.18-utils-32:9.18.29-14.el9_8.10.x86_64"
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      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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            "SUSE Liberty Linux 9:bind9.18-chroot-32:9.18.29-14.el9_8.10.x86_64",
            "SUSE Liberty Linux 9:bind9.18-devel-32:9.18.29-14.el9_8.10.i686",
            "SUSE Liberty Linux 9:bind9.18-devel-32:9.18.29-14.el9_8.10.x86_64",
            "SUSE Liberty Linux 9:bind9.18-dnssec-utils-32:9.18.29-14.el9_8.10.x86_64",
            "SUSE Liberty Linux 9:bind9.18-doc-32:9.18.29-14.el9_8.10.noarch",
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            "SUSE Liberty Linux 9:bind9.18-libs-32:9.18.29-14.el9_8.10.x86_64",
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          "category": "impact",
          "date": "2026-10-05T00:00:00Z",
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      "title": "CVE-2026-81736"
    }
  ]
}

CVE-2026-19666 (GCVE-0-2026-19666)

Vulnerability from cvelistv5 – Published: 2026-09-16 14:02 – Updated: 2026-09-17 17:38

Title

Use-after-free in query_addnoqnameproof() via the DNS64 filter64 path

Summary

On a resolver configured to use ``dns64``, if an applicable answer from the authoritative server is malformed in a specific way, the resolver `named` process will exit unexpectedly. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-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 2026-09-17 17:38 UTC

CWE

CWE-416 - Use After Free

Assigner

isc mitre root Scorecard

References

3 references

URL	Tags
https://kb.isc.org/docs/cve-2026-19666	vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.29	patch
https://downloads.isc.org/isc/bind9/9.21.26	patch

Impacted products

1 product

Vendor	Product	Version
ISC	BIND 9	Affected: 9.11.0 , ≤ 9.18.50 (custom) Affected: 9.20.0 , ≤ 9.20.27 (custom) Affected: 9.21.0 , ≤ 9.21.25 (custom) Affected: 9.11.3-S1 , ≤ 9.18.50-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.27-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:::::::: cpe:2.3:a:isc:bind::::::::

Date Public

2026-09-16 00:00

Credits

ISC would like to thank Rintaro Kawasugi for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

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CVE-2026-19667 (GCVE-0-2026-19667)

Vulnerability from cvelistv5 – Published: 2026-09-16 13:46 – Updated: 2026-09-17 18:45

Title

Remote assertion failure via 16-bit length truncation in `dns_ncache_add()`

Summary

If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in `named` results in a negative cache entry of 0 bytes. When this entry is subsequently read, `named` aborts. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-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 2026-09-17 18:45 UTC

CWE

CWE-197 - Numeric Truncation Error

Assigner

isc mitre root Scorecard

References

3 references

URL	Tags
https://kb.isc.org/docs/cve-2026-19667	vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.29	patch
https://downloads.isc.org/isc/bind9/9.21.26	patch

Impacted products

1 product

Vendor	Product	Version
ISC	BIND 9	Affected: 9.11.0 , ≤ 9.18.50 (custom) Affected: 9.20.0 , ≤ 9.20.27 (custom) Affected: 9.21.0 , ≤ 9.21.25 (custom) Affected: 9.11.3-S1 , ≤ 9.18.50-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.27-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:::::::: cpe:2.3:a:isc:bind::::::::

Date Public

2026-09-16 00:00

Credits

ISC would like to thank Rintaro Kawasugi for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

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CVE-2026-80274 (GCVE-0-2026-80274)

Vulnerability from cvelistv5 – Published: 2026-09-16 14:07 – Updated: 2026-09-17 17:37

Title

Validating resolver can abort while caching a mismatched NOQNAME proof

Summary

If a BIND resolver sends a query for a DNSSEC-signed authoritative zone, and the authoritative server replies with a valid wildcard answer and signed NSEC3 proof, followed by an unsigned NSEC at the same owner name, it will trigger an unexpected program exit. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-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 2026-09-17 17:37 UTC

CWE

CWE-617 - Reachable Assertion

Assigner

isc mitre root Scorecard

References

3 references

URL	Tags
https://kb.isc.org/docs/cve-2026-80274	vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.29	patch
https://downloads.isc.org/isc/bind9/9.21.26	patch

Impacted products

1 product

Vendor	Product	Version
ISC	BIND 9	Affected: 9.11.0 , ≤ 9.18.50 (custom) Affected: 9.20.0 , ≤ 9.20.27 (custom) Affected: 9.21.0 , ≤ 9.21.25 (custom) Affected: 9.11.3-S1 , ≤ 9.18.50-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.27-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:::::::: cpe:2.3:a:isc:bind::::::::

Date Public

2026-09-16 00:00

Credits

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

Show details on NVD website

JSON

To clipboard

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CVE-2026-81563 (GCVE-0-2026-81563)

Vulnerability from cvelistv5 – Published: 2026-09-16 14:00 – Updated: 2026-09-17 17:47

Title

SVCB AliasMode additional-data error leaks qpcache references

Summary

A BIND resolver encountering an SVCB/HTTPS AliasMode record referencing 14 or more SVCB/HTTPS ServiceMode records may fail to properly deallocate internal resources. If this happens repeatedly, resource exhaustion will eventually prevent the resolver from performing new recursive lookups. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-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 2026-09-17 17:47 UTC

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

isc mitre root Scorecard

References

3 references

URL	Tags
https://kb.isc.org/docs/cve-2026-81563	vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.29	patch
https://downloads.isc.org/isc/bind9/9.21.26	patch

Impacted products

1 product

Vendor	Product	Version
ISC	BIND 9	Affected: 9.18.0 , ≤ 9.18.50 (custom) Affected: 9.20.0 , ≤ 9.20.27 (custom) Affected: 9.21.0 , ≤ 9.21.25 (custom) Affected: 9.18.11-S1 , ≤ 9.18.50-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.27-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:::::::: cpe:2.3:a:isc:bind::::::::

Date Public

2026-09-16 00:00

Credits

ISC would like to thank Samy Medjahed/Ap4sh for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

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CVE-2026-81736 (GCVE-0-2026-81736)

Vulnerability from cvelistv5 – Published: 2026-09-16 13:44 – Updated: 2026-09-17 18:46

Title

Remote CPU denial of service through cached SVCB/HTTPS AliasMode trees

Summary

If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-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 2026-09-17 18:45 UTC

CWE

CWE-1050 - Excessive Platform Resource Consumption within a Loop

Assigner

isc mitre root Scorecard

References

3 references

URL	Tags
https://kb.isc.org/docs/cve-2026-81736	vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.29	patch
https://downloads.isc.org/isc/bind9/9.21.26	patch

Impacted products

1 product

Vendor	Product	Version
ISC	BIND 9	Affected: 9.18.0 , ≤ 9.18.50 (custom) Affected: 9.20.0 , ≤ 9.20.27 (custom) Affected: 9.21.0 , ≤ 9.21.25 (custom) Affected: 9.18.11-S1 , ≤ 9.18.50-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.27-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:::::::: cpe:2.3:a:isc:bind::::::::

Date Public

2026-09-16 00:00

Credits

ISC would like to thank Henrique Pereira for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

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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.

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.

Action not permitted

RHSA-2026:75578

CVE-2026-19666 (GCVE-0-2026-19666)

CVE-2026-19667 (GCVE-0-2026-19667)

CVE-2026-80274 (GCVE-0-2026-80274)

CVE-2026-81563 (GCVE-0-2026-81563)

CVE-2026-81736 (GCVE-0-2026-81736)

Tags

Sightings

Nomenclature

Related by attack behaviour