Bug 2504166 (CVE-2026-13321) - CVE-2026-13321 bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field
Summary: CVE-2026-13321 bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Nex...
Keywords:
Status: NEW
Alias: CVE-2026-13321
Deadline: 2026-07-22
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2524373 2524374
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-21 19:47 UTC by OSIDB Bzimport
Modified: 2026-09-08 13:53 UTC (History)
19 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:56071 0 None None None 2026-08-18 10:19:47 UTC
Red Hat Product Errata RHSA-2026:54509 0 None None None 2026-08-13 10:52:52 UTC
Red Hat Product Errata RHSA-2026:54510 0 None None None 2026-08-13 11:02:26 UTC
Red Hat Product Errata RHSA-2026:54654 0 None None None 2026-08-13 17:48:07 UTC
Red Hat Product Errata RHSA-2026:55437 0 None None None 2026-08-17 04:19:23 UTC
Red Hat Product Errata RHSA-2026:55441 0 None None None 2026-08-17 03:44:36 UTC
Red Hat Product Errata RHSA-2026:55442 0 None None None 2026-08-17 05:45:19 UTC
Red Hat Product Errata RHSA-2026:57189 0 None None None 2026-08-19 23:36:51 UTC
Red Hat Product Errata RHSA-2026:57362 0 None None None 2026-08-25 13:47:42 UTC
Red Hat Product Errata RHSA-2026:60383 0 None None None 2026-08-26 19:45:00 UTC

Description OSIDB Bzimport 2026-07-21 19:47:52 UTC 
The resolver accepts validly-signed NSEC records where the "Next
  Domain Name" field points outside the signer's zone. An attacker
  controlling ANY DNSSEC-signed zone can craft NSEC records spanning
  into victim zones, enabling cross-zone cache poisoning with AD=1
  (Authenticated Data flag set)
Comment 3 errata-xmlrpc 2026-08-13 10:52:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:54509 https://access.redhat.com/errata/RHSA-2026:54509
Comment 4 errata-xmlrpc 2026-08-13 11:02:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:54510 https://access.redhat.com/errata/RHSA-2026:54510
Comment 5 errata-xmlrpc 2026-08-13 17:48:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:54654 https://access.redhat.com/errata/RHSA-2026:54654
Comment 6 errata-xmlrpc 2026-08-17 03:44:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:55441 https://access.redhat.com/errata/RHSA-2026:55441
Comment 7 errata-xmlrpc 2026-08-17 04:19:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:55437 https://access.redhat.com/errata/RHSA-2026:55437
Comment 8 errata-xmlrpc 2026-08-17 05:45:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:55442 https://access.redhat.com/errata/RHSA-2026:55442
Comment 9 errata-xmlrpc 2026-08-19 23:36:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:57189 https://access.redhat.com/errata/RHSA-2026:57189
Comment 10 errata-xmlrpc 2026-08-25 13:47:41 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.22

Via RHSA-2026:57362 https://access.redhat.com/errata/RHSA-2026:57362
Comment 11 errata-xmlrpc 2026-08-26 19:44:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:60383 https://access.redhat.com/errata/RHSA-2026:60383
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