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Fencer Vulns
high 7.5

CVE-2026-96888 json

Named may terminate unexpectedly when a redirect zone is used with strict QNAME minimization

published 2026-10-21 18 d ago modified 2026-10-26 13 d ago also EUVD-2026-107255

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with an assertion failure while processing the redirect. This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.

Patch / fix

  • bind9 Debian 13 1:9.20.30-1~deb13u1
  • bind9 Debian 14 1:9.20.30-1

debian advisories DEBIAN-CVE-2026-96888

  • bind9 Ubuntu 22.04 LTS 1:9.18.39-0ubuntu0.22.04.8
  • bind9 Ubuntu 24.04 LTS 1:9.18.39-0ubuntu0.24.04.9
  • bind9 Ubuntu 26.10 1:9.20.24-1ubuntu3.1
  • bind9 Ubuntu 26.04 LTS 1:9.20.24-1ubuntu0.5

ubuntu advisories UBUNTU-CVE-2026-96888

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • bind openSUSE Tumbleweed 9.20.30-1.1

opensuse advisories openSUSE-SU-2026:12231-1

  • bind AlmaLinux 9 32:9.16.23-40.el9_8.13
  • bind-libs AlmaLinux 9 32:9.16.23-40.el9_8.13
  • bind-utils AlmaLinux 9 32:9.16.23-40.el9_8.13
  • bind-chroot AlmaLinux 9 32:9.16.23-40.el9_8.13
  • bind-license AlmaLinux 9 32:9.16.23-40.el9_8.13
  • python3-bind AlmaLinux 9 32:9.16.23-40.el9_8.13
  • bind-dnssec-utils AlmaLinux 9 32:9.16.23-40.el9_8.13
  • bind9.16 AlmaLinux 8 32:9.16.23-0.22.el8_10.21

almalinux advisories ALSA-2026:93610ALSA-2026:94011ALSA-2026:93072ALSA-2026:92419

  • bind Rocky Linux 9 2:9.16.23-40.el9_8.13
  • bind9.16 Rocky Linux 8 2:9.16.23-0.22.el8_10.21
  • bind9.18 Rocky Linux 9 2:9.18.29-14.el9_8.12
  • bind Rocky Linux 10 2:9.18.33-15.el10_2.14

rocky linux advisories RLSA-2026:93610RLSA-2026:94011RLSA-2026:93072RLSA-2026:92419

  • bind Alpine 3.24, Alpine 3.23, Alpine 3.22 9.20.30-r0

alpine advisories ALPINE-CVE-2026-96888

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-96888 updated cvss 7.5

bind: bind: Denial of Service via assertion failure during redirect processing

  • Red Hat Enterprise Linux 9 dhcp, dhcp-relay, dhcp-client, dhcp-common, dhcp-server Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.6) bind-libs 9.16.23-31.el9_6.5, bind9.18-libs 9.18.29-4.el9_6.5
    fixed: vendor fix RHSA-2026:95048
  • Red Hat Enterprise Linux AppStream (v. 8) bind9.16 9.16.23-0.22.el8_10.21, bind9.16-libs 9.16.23-0.22.el8_10.21, bind9.16-utils 9.16.23-0.22.el8_10.21, bind9.16-chroot 9.16.23-0.22.el8_10.21, bind9.16-license 9.16.23-0.22.el8_10.21, python3-bind9.16 9.16.23-0.22.el8_10.21, +1 more
    fixed: vendor fix RHSA-2026:94011
  • Red Hat Enterprise Linux AppStream (v. 9) bind 9.16.23-40.el9_8.13, bind9.18 9.18.29-14.el9_8.12, bind-libs 9.16.23-40.el9_8.13, bind-utils 9.16.23-40.el9_8.13, bind-chroot 9.16.23-40.el9_8.13, bind-license 9.16.23-40.el9_8.13, +6 more
    fixed: vendor fix RHSA-2026:93610
  • Red Hat Enterprise Linux AppStream (v. 10) bind 9.18.33-15.el10_2.14, bind-libs 9.18.33-15.el10_2.14, bind-utils 9.18.33-15.el10_2.14, bind-chroot 9.18.33-15.el10_2.14, bind-license 9.18.33-15.el10_2.14, bind-dnssec-utils 9.18.33-15.el10_2.14
    fixed: vendor fix RHSA-2026:92419
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) bind9.16 9.16.23-0.7.el8_6.12, bind9.16-libs 9.16.23-0.7.el8_6.12
    fixed: vendor fix RHSA-2026:94277
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) bind9.16 9.16.23-0.14.el8_8.10, bind9.16-libs 9.16.23-0.14.el8_8.10
    fixed: vendor fix RHSA-2026:95017
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) bind 9.16.23-11.el9_2.12, bind-libs 9.16.23-11.el9_2.12
    fixed: vendor fix RHSA-2026:95242
show 11 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) bind 9.16.23-18.el9_4.13, bind-libs 9.16.23-18.el9_4.13
    fixed: vendor fix RHSA-2026:95241
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) bind 9.18.33-4.el10_0.6, bind-libs 9.18.33-4.el10_0.6
    fixed: vendor fix RHSA-2026:94115
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) bind 9.16.23-31.el9_6.5, bind9.18 9.18.29-4.el9_6.5, bind-libs 9.16.23-31.el9_6.5, bind-utils 9.16.23-31.el9_6.5, bind9.18-libs 9.18.29-4.el9_6.5, bind-dnssec-utils 9.16.23-31.el9_6.5
    fixed: vendor fix RHSA-2026:95048
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) bind9.16 9.16.23-0.7.el8_6.12, bind9.16-libs 9.16.23-0.7.el8_6.12
    fixed: vendor fix RHSA-2026:94277
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) bind9.16 9.16.23-0.14.el8_8.10, bind9.16-libs 9.16.23-0.14.el8_8.10
    fixed: vendor fix RHSA-2026:95017
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind-libs 9.16.23-40.el9_8.13, bind9.18-libs 9.18.29-14.el9_8.12
    fixed: vendor fix RHSA-2026:93610
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) bind-doc 9.18.33-15.el10_2.14, bind-devel 9.18.33-15.el10_2.14, bind-debuginfo 9.18.33-15.el10_2.14, bind-debugsource 9.18.33-15.el10_2.14, bind-libs-debuginfo 9.18.33-15.el10_2.14, bind-utils-debuginfo 9.18.33-15.el10_2.14, +1 more
    fixed: vendor fix RHSA-2026:92419
  • Red Hat Enterprise Linux CRB (v. 8) bind9.16-libs 9.16.23-0.22.el8_10.21
    fixed: vendor fix RHSA-2026:94011
  • Red Hat Hardened Images bind 9.20.30-0.1.hum1, bind-libs 9.20.30-0.1.hum1, bind-utils 9.20.30-0.1.hum1, bind-chroot 9.20.30-0.1.hum1, bind-dnssec-utils 9.20.30-0.1.hum1
    fixed: vendor fix RHSA-2026:87309
  • Red Hat OpenShift Container Platform 4.22 rhcos 4.22.9.8.202611032353
    fixed: vendor fix RHSA-2026:95346
  • Red Hat CodeReady Linux Builder EUS (v.9.6) bind-doc 9.16.23-31.el9_6.5, bind-devel 9.16.23-31.el9_6.5, bind9.18-doc 9.18.29-4.el9_6.5, bind9.18-devel 9.18.29-4.el9_6.5, bind-debuginfo 9.16.23-31.el9_6.5, bind-debugsource 9.16.23-31.el9_6.5, +7 more Red Hat Enterprise Linux 6 bind, bind-sdb, bind-libs, bind-utils, bind-chroot Red Hat Enterprise Linux 7 bind, bind-sdb, bind-libs, bind-utils, bind-chroot, bind-pkcs11, +6 more Red Hat Enterprise Linux 8 bind, bind-sdb, bind-libs, bind-utils, bind-chroot, bind-pkcs11, +7 more Red Hat Enterprise Linux AppStream AUS (v.8.6) bind9.16-utils 9.16.23-0.7.el8_6.12, bind9.16-chroot 9.16.23-0.7.el8_6.12, bind9.16-license 9.16.23-0.7.el8_6.12 Red Hat Enterprise Linux AppStream E4S (v.8.8) bind9.16-utils 9.16.23-0.14.el8_8.10, bind9.16-chroot 9.16.23-0.14.el8_8.10, bind9.16-license 9.16.23-0.14.el8_8.10, python3-bind9.16 9.16.23-0.14.el8_8.10, bind9.16-dnssec-utils 9.16.23-0.14.el8_8.10
    +8 more products
    Red Hat Enterprise Linux AppStream E4S (v.9.2) bind-utils 9.16.23-11.el9_2.12, bind-chroot 9.16.23-11.el9_2.12, bind-license 9.16.23-11.el9_2.12, python3-bind 9.16.23-11.el9_2.12, bind-dnssec-utils 9.16.23-11.el9_2.12 Red Hat Enterprise Linux AppStream E4S (v.9.4) bind-utils 9.16.23-18.el9_4.13, bind-chroot 9.16.23-18.el9_4.13, bind-license 9.16.23-18.el9_4.13, python3-bind 9.16.23-18.el9_4.13, bind-dnssec-utils 9.16.23-18.el9_4.13 Red Hat Enterprise Linux AppStream EUS (v. 10.0) bind-utils 9.18.33-4.el10_0.6, bind-chroot 9.18.33-4.el10_0.6, bind-license 9.18.33-4.el10_0.6, bind-dnssec-utils 9.18.33-4.el10_0.6 Red Hat Enterprise Linux AppStream EUS (v.9.6) bind-chroot 9.16.23-31.el9_6.5, bind-license 9.16.23-31.el9_6.5, python3-bind 9.16.23-31.el9_6.5, bind9.18-utils 9.18.29-4.el9_6.5, bind9.18-chroot 9.18.29-4.el9_6.5, bind9.18-dnssec-utils 9.18.29-4.el9_6.5 Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) bind9.16-utils 9.16.23-0.7.el8_6.12, bind9.16-chroot 9.16.23-0.7.el8_6.12, bind9.16-license 9.16.23-0.7.el8_6.12 Red Hat Enterprise Linux AppStream TUS (v.8.8) bind9.16-utils 9.16.23-0.14.el8_8.10, bind9.16-chroot 9.16.23-0.14.el8_8.10, bind9.16-license 9.16.23-0.14.el8_8.10, python3-bind9.16 9.16.23-0.14.el8_8.10, bind9.16-dnssec-utils 9.16.23-0.14.el8_8.10 Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) bind-doc 9.18.33-4.el10_0.6, bind-devel 9.18.33-4.el10_0.6, bind-debuginfo 9.18.33-4.el10_0.6, bind-debugsource 9.18.33-4.el10_0.6, bind-libs-debuginfo 9.18.33-4.el10_0.6, bind-utils-debuginfo 9.18.33-4.el10_0.6, +1 more Red Hat OpenShift AI (RHOAI) rhoai/odh-training-operator-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
18 d ago

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • ISC BIND 9

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.