Bug 2535435 (CVE-2026-19667) - CVE-2026-19667 bind9: bind: BIND 9: Denial of Service via 16-bit length truncation in DNS negative cache handling
Summary: CVE-2026-19667 bind9: bind: BIND 9: Denial of Service via 16-bit length trunc...
Keywords:
Status: NEW
Alias: CVE-2026-19667
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2535867
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-16 13:59 UTC by OSIDB Bzimport
Modified: 2026-11-05 08:55 UTC (History)
17 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 RHSA-2026:75577 0 None None None 2026-10-05 05:34:21 UTC
Red Hat Product Errata RHSA-2026:75578 0 None None None 2026-10-05 08:05:57 UTC
Red Hat Product Errata RHSA-2026:75767 0 None None None 2026-10-05 15:43:50 UTC
Red Hat Product Errata RHSA-2026:79113 0 None None None 2026-10-08 13:35:43 UTC
Red Hat Product Errata RHSA-2026:79162 0 None None None 2026-10-08 13:47:47 UTC
Red Hat Product Errata RHSA-2026:89197 0 None None None 2026-10-27 22:04:31 UTC
Red Hat Product Errata RHSA-2026:94115 0 None None None 2026-11-03 01:22:11 UTC
Red Hat Product Errata RHSA-2026:94277 0 None None None 2026-11-03 03:50:14 UTC
Red Hat Product Errata RHSA-2026:94278 0 None None None 2026-11-03 03:55:13 UTC
Red Hat Product Errata RHSA-2026:95017 0 None None None 2026-11-04 07:45:24 UTC
Red Hat Product Errata RHSA-2026:95048 0 None None None 2026-11-04 08:09:50 UTC
Red Hat Product Errata RHSA-2026:95241 0 None None None 2026-11-04 16:05:04 UTC
Red Hat Product Errata RHSA-2026:95242 0 None None None 2026-11-04 16:01:11 UTC
Red Hat Product Errata RHSA-2026:95435 0 None None None 2026-11-05 07:20:17 UTC
Red Hat Product Errata RHSA-2026:95477 0 None None None 2026-11-05 08:42:15 UTC
Red Hat Product Errata RHSA-2026:95478 0 None None None 2026-11-05 08:55:00 UTC

Description OSIDB Bzimport 2026-09-16 13:59:17 UTC 
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.
Comment 3 Jon Orris 2026-10-05 05:34:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:75577 https://access.redhat.com/errata/RHSA-2026:75577
Comment 4 Jon Orris 2026-10-05 08:05:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:75578 https://access.redhat.com/errata/RHSA-2026:75578
Comment 5 Jon Orris 2026-10-05 15:43:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:75767 https://access.redhat.com/errata/RHSA-2026:75767
Comment 7 Jon Orris 2026-10-08 13:35:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:79113 https://access.redhat.com/errata/RHSA-2026:79113
Comment 8 Jon Orris 2026-10-08 13:47:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:79162 https://access.redhat.com/errata/RHSA-2026:79162
Comment 11 Jon Orris 2026-10-27 22:04:29 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.22

Via RHSA-2026:89197 https://access.redhat.com/errata/RHSA-2026:89197
Comment 12 Jon Orris 2026-11-03 01:22:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:94115 https://access.redhat.com/errata/RHSA-2026:94115
Comment 13 Jon Orris 2026-11-03 03:50:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:94277 https://access.redhat.com/errata/RHSA-2026:94277
Comment 14 Jon Orris 2026-11-03 03:55:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:94278 https://access.redhat.com/errata/RHSA-2026:94278
Comment 15 Jon Orris 2026-11-04 07:45:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:95017 https://access.redhat.com/errata/RHSA-2026:95017
Comment 16 Jon Orris 2026-11-04 08:09:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:95048 https://access.redhat.com/errata/RHSA-2026:95048
Comment 17 Jon Orris 2026-11-04 16:01:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:95242 https://access.redhat.com/errata/RHSA-2026:95242
Comment 18 Jon Orris 2026-11-04 16:05:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:95241 https://access.redhat.com/errata/RHSA-2026:95241
Comment 19 Jon Orris 2026-11-05 07:20:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:95435 https://access.redhat.com/errata/RHSA-2026:95435
Comment 20 Jon Orris 2026-11-05 08:42:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:95477 https://access.redhat.com/errata/RHSA-2026:95477
Comment 21 Jon Orris 2026-11-05 08:54:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:95478 https://access.redhat.com/errata/RHSA-2026:95478
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