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Fencer Vulns
high 7.5

CVE-2026-80274 json

Validating resolver can abort while caching a mismatched NOQNAME proof

published 2026-09-16 53 d ago modified 2026-10-26 13 d ago also EUVD-2026-80778

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

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.

Patch / fix

  • bind9 Debian 12 1:9.18.49-1~deb12u3
  • bind9 Debian 13 1:9.20.29-1~deb13u1
  • bind9 Debian 14 1:9.20.29-1

debian advisories DEBIAN-CVE-2026-80274

  • bind9 Ubuntu 22.04 LTS 1:9.18.39-0ubuntu0.22.04.7
  • bind9 Ubuntu 24.04 LTS 1:9.18.39-0ubuntu0.24.04.8
  • bind9 Ubuntu 26.10 1:9.20.24-1ubuntu3.1
  • bind9 Ubuntu 26.04 LTS 1:9.20.24-1ubuntu0.4
  • bind9 Ubuntu Pro 14.04 LTS 1:9.9.5.dfsg-3ubuntu0.19+esm15
  • bind9 Ubuntu Pro 16.04 LTS 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11
  • bind9 Ubuntu Pro 18.04 LTS 1:9.11.3+dfsg-1ubuntu1.19+esm6
  • bind9 Ubuntu Pro 20.04 LTS 1:9.18.30-0ubuntu0.20.04.2+esm3

ubuntu advisories UBUNTU-CVE-2026-80274

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 RHEL 8 32:9.11.36-16.el8_10.16
  • bind-sdb RHEL 8 32:9.11.36-16.el8_10.16
  • bind-libs RHEL 8 32:9.11.36-16.el8_10.16
  • bind-utils RHEL 8 32:9.11.36-16.el8_10.16
  • bind-chroot RHEL 8 32:9.11.36-16.el8_10.16
  • bind-pkcs11 RHEL 8 32:9.11.36-16.el8_10.16
  • bind-license RHEL 8 32:9.11.36-16.el8_10.16
  • python3-bind RHEL 8 32:9.11.36-16.el8_10.16

red hat advisories RHSA-2026:79162RHSA-2026:79113RHSA-2026:75767RHSA-2026:75578RHSA-2026:75577RHSA-2026:68279

  • bind SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 9.16.50-150500.8.46.1
  • bind SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 9.16.50-150400.5.70.1
  • bind SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 9.16.6-150300.22.65.1
  • bind Multi Linux Manager Tools SLE-Micro-5 9.16.6-150000.12.94.1
  • bind SLES for SAP applications 16.0, SLES 16.0 9.20.29-160000.1.1
  • bind SLE Module for Server Applications 15 SP7, SLE Module for Basesystem 15 SP7 9.20.29-150700.3.32.2
  • bind SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 9.11.22-3.77.1
  • bind SLES for SAP 15 SP6, SLES 15 SP6-LTSS 9.18.50-150600.3.35.1

suse advisories SUSE-SU-2026:4772-1SUSE-SU-2026:4664-1SUSE-SU-2026:4657-1SUSE-SU-2026:4635-1SUSE-SU-2026:4608-1SUSE-SU-2026:4597-1

  • bind openSUSE Leap 16.0 9.20.29-160000.1.1
  • bind openSUSE Tumbleweed 9.20.29-1.1

opensuse advisories openSUSE-SU-2026:22049-1openSUSE-SU-2026:11916-1

  • bind9.16 AlmaLinux 8 32:9.16.23-0.22.el8_10.16
  • bind9.16-libs AlmaLinux 8 32:9.16.23-0.22.el8_10.16
  • bind9.16-utils AlmaLinux 8 32:9.16.23-0.22.el8_10.16
  • bind9.16-chroot AlmaLinux 8 32:9.16.23-0.22.el8_10.16
  • bind9.16-license AlmaLinux 8 32:9.16.23-0.22.el8_10.16
  • python3-bind9.16 AlmaLinux 8 32:9.16.23-0.22.el8_10.16
  • bind9.16-dnssec-utils AlmaLinux 8 32:9.16.23-0.22.el8_10.16
  • bind AlmaLinux 8 32:9.11.36-16.el8_10.16

almalinux advisories ALSA-2026:79113ALSA-2026:79162ALSA-2026:75577ALSA-2026:75578ALSA-2026:75767

  • bind9.16 Rocky Linux 8 2:9.16.23-0.22.el8_10.16
  • bind Rocky Linux 8 2:9.11.36-16.el8_10.16
  • bind Rocky Linux 10 2:9.18.33-15.el10_2.12
  • bind9.18 Rocky Linux 9 2:9.18.29-14.el9_8.10
  • bind Rocky Linux 9 2:9.16.23-40.el9_8.10

rocky linux advisories RLSA-2026:79113RLSA-2026:79162RLSA-2026:75577RLSA-2026:75578RLSA-2026:75767

  • bind Alpine 3.24, Alpine 3.23, Alpine 3.22 9.20.29-r0

alpine advisories ALPINE-CVE-2026-80274

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

  • bind Azure Linux 3.0 9.20.30-1

azure linux advisories AZL-103335

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2026-80274 updated cvss 7.5

bind: BIND: Denial of Service via crafted DNSSEC reply

  • Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, 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) bind 9.11.36-16.el8_10.16, bind-sdb 9.11.36-16.el8_10.16, bind-libs 9.11.36-16.el8_10.16, bind-utils 9.11.36-16.el8_10.16, bind9.16 9.16.23-0.22.el8_10.16, bind-chroot 9.11.36-16.el8_10.16, +13 more
    fixed: vendor fix RHSA-2026:79162
  • Red Hat Enterprise Linux AppStream (v. 9) bind 9.16.23-40.el9_8.10, bind9.18 9.18.29-14.el9_8.10, bind-libs 9.16.23-40.el9_8.10, bind-utils 9.16.23-40.el9_8.10, bind-chroot 9.16.23-40.el9_8.10, bind-license 9.16.23-40.el9_8.10, +6 more
    fixed: vendor fix RHSA-2026:75767
  • Red Hat Enterprise Linux AppStream (v. 10) bind 9.18.33-15.el10_2.12, bind-libs 9.18.33-15.el10_2.12, bind-utils 9.18.33-15.el10_2.12, bind-chroot 9.18.33-15.el10_2.12, bind-license 9.18.33-15.el10_2.12, bind-dnssec-utils 9.18.33-15.el10_2.12
    fixed: vendor fix RHSA-2026:75577
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) bind 9.11.26-4.el8_4.10, bind-sdb 9.11.26-4.el8_4.10, bind-libs 9.11.26-4.el8_4.10, bind-utils 9.11.26-4.el8_4.10, bind-pkcs11 9.11.26-4.el8_4.10, bind-libs-lite 9.11.26-4.el8_4.10, +2 more
    fixed: vendor fix RHSA-2026:95477
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) bind 9.11.36-3.el8_6.13, bind-sdb 9.11.36-3.el8_6.13, bind-libs 9.11.36-3.el8_6.13, bind-utils 9.11.36-3.el8_6.13, bind9.16 9.16.23-0.7.el8_6.12, bind-chroot 9.11.36-3.el8_6.13, +8 more
    fixed: vendor fix RHSA-2026:95435
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) bind 9.11.36-8.el8_8.11, bind-sdb 9.11.36-8.el8_8.11, bind-utils 9.11.36-8.el8_8.11, bind-pkcs11 9.11.36-8.el8_8.11, bind9.16 9.16.23-0.14.el8_8.10, bind-libs-lite 9.11.36-8.el8_8.11, +5 more
    fixed: vendor fix RHSA-2026:95478
show 21 more
  • 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
  • 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.8.4) bind 9.11.26-4.el8_4.10, bind-sdb 9.11.26-4.el8_4.10, bind-libs 9.11.26-4.el8_4.10, bind-utils 9.11.26-4.el8_4.10, bind-pkcs11 9.11.26-4.el8_4.10, bind-libs-lite 9.11.26-4.el8_4.10, +2 more
    fixed: vendor fix RHSA-2026:95477
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) bind 9.11.36-3.el8_6.13, bind-sdb 9.11.36-3.el8_6.13, bind-libs 9.11.36-3.el8_6.13, bind-utils 9.11.36-3.el8_6.13, bind9.16 9.16.23-0.7.el8_6.12, bind-chroot 9.11.36-3.el8_6.13, +8 more
    fixed: vendor fix RHSA-2026:95435
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) bind 9.11.36-8.el8_8.11, bind-sdb 9.11.36-8.el8_8.11, bind-utils 9.11.36-8.el8_8.11, bind-pkcs11 9.11.36-8.el8_8.11, bind9.16 9.16.23-0.14.el8_8.10, bind-libs-lite 9.11.36-8.el8_8.11, +5 more
    fixed: vendor fix RHSA-2026:95478
  • Red Hat Enterprise Linux BaseOS (v. 8) bind 9.11.36-16.el8_10.16, bind-export-libs 9.11.36-16.el8_10.16
    fixed: vendor fix RHSA-2026:79162
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bind 9.11.26-4.el8_4.10, bind-export-libs 9.11.26-4.el8_4.10
    fixed: vendor fix RHSA-2026:95477
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bind 9.11.36-3.el8_6.13, bind-export-libs 9.11.36-3.el8_6.13
    fixed: vendor fix RHSA-2026:95435
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bind 9.11.36-8.el8_8.11, bind-export-libs 9.11.36-8.el8_8.11
    fixed: vendor fix RHSA-2026:95478
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bind 9.11.26-4.el8_4.10, bind-export-libs 9.11.26-4.el8_4.10
    fixed: vendor fix RHSA-2026:95477
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bind 9.11.36-3.el8_6.13, bind-export-libs 9.11.36-3.el8_6.13
    fixed: vendor fix RHSA-2026:95435
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bind 9.11.36-8.el8_8.11, bind-export-libs 9.11.36-8.el8_8.11
    fixed: vendor fix RHSA-2026:95478
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind-libs 9.16.23-40.el9_8.10, bind9.18-libs 9.18.29-14.el9_8.10
    fixed: vendor fix RHSA-2026:75767
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) bind-doc 9.18.33-15.el10_2.12, bind-devel 9.18.33-15.el10_2.12, bind-debuginfo 9.18.33-15.el10_2.12, bind-debugsource 9.18.33-15.el10_2.12, bind-libs-debuginfo 9.18.33-15.el10_2.12, bind-utils-debuginfo 9.18.33-15.el10_2.12, +1 more
    fixed: vendor fix RHSA-2026:75577
  • Red Hat Enterprise Linux CRB (v. 8) bind9.16-libs 9.16.23-0.22.el8_10.16
    fixed: vendor fix RHSA-2026:79113
  • Red Hat Enterprise Linux Server (v. 7 ELS) bind 9.11.4-26.P2.el7_9.22, bind-libs 9.11.4-26.P2.el7_9.22, bind-pkcs11 9.11.4-26.P2.el7_9.22, bind-libs-lite 9.11.4-26.P2.el7_9.22, bind-export-libs 9.11.4-26.P2.el7_9.22, bind-pkcs11-libs 9.11.4-26.P2.el7_9.22 Red Hat Enterprise Linux Server Optional (v. 7 ELS) bind-sdb 9.11.4-26.P2.el7_9.22
    fixed: vendor fix RHSA-2026:95726
  • Red Hat Hardened Images bind 9.20.29-0.1.hum1, bind-libs 9.20.29-0.1.hum1, bind-utils 9.20.29-0.1.hum1, bind-chroot 9.20.29-0.1.hum1, bind-dnssec-utils 9.20.29-0.1.hum1
    fixed: vendor fix RHSA-2026:68279
  • Red Hat OpenShift Container Platform 4.22 rhcos 4.22.9.8.202610241758
    fixed: vendor fix RHSA-2026:89197
  • 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 9 dhcp, dhcp-relay, dhcp-client, dhcp-common, dhcp-server Red Hat Enterprise Linux AppStream AUS (v.8.4) bind-chroot 9.11.26-4.el8_4.10, bind-license 9.11.26-4.el8_4.10, python3-bind 9.11.26-4.el8_4.10, bind-sdb-chroot 9.11.26-4.el8_4.10 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) bind-libs 9.11.36-8.el8_8.11, bind-chroot 9.11.36-8.el8_8.11, bind-license 9.11.36-8.el8_8.11, python3-bind 9.11.36-8.el8_8.11, bind-sdb-chroot 9.11.36-8.el8_8.11, bind9.16-chroot 9.16.23-0.14.el8_8.10, +2 more
    +4 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
    not affected: vulnerable code not present

10 more not affected in the full advisory

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
52 d ago

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% 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.