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Fencer Vulns
medium 6.5

CVE-2026-10822 json

Key Record using PRIVATEDNS algorithm may lead to unexpected exit

published 2026-07-22 3 mo ago modified 2026-11-02 6 d ago also EUVD-2026-47705

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

If BIND encounters a particular invalid data structure in a DNS record, it will accept the invalid data, and may subsequently abort and exit.

BIND will first need to store a DNS record for a key (KEY, DNSKEY, etc.). That key must specify a PRIVATEDNS algorithm (253), and in the algorithm identifier, improperly give a length longer than the actual identifier data. The invalid identifier will be stored. If BIND later needs to render that record to text, it will use the invalid length during processing, leading to a consistency check failing. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Patch / fix

  • isc bind 9.20.26, 9.21.24
  • bind9 Debian 12 1:9.18.49-1~deb12u2
  • bind9 Debian 13 1:9.20.26-1~deb13u1
  • bind9 Debian 14 1:9.20.26-1

debian advisories DEBIAN-CVE-2026-10822

  • bind9 Ubuntu 22.04 LTS 1:9.18.39-0ubuntu0.22.04.5
  • bind9 Ubuntu 24.04 LTS 1:9.18.39-0ubuntu0.24.04.6
  • bind9 Ubuntu 26.04 LTS 1:9.20.24-1ubuntu0.2
  • bind9 Ubuntu Pro 20.04 LTS 1:9.18.30-0ubuntu0.20.04.2+esm3

ubuntu advisories UBUNTU-CVE-2026-10822

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 hummingbird 1 9.20.26-0.1.hum1
  • bind-libs hummingbird 1 9.20.26-0.1.hum1
  • bind-utils hummingbird 1 9.20.26-0.1.hum1
  • bind-chroot hummingbird 1 9.20.26-0.1.hum1
  • bind-dnssec-utils hummingbird 1 9.20.26-0.1.hum1

red hat advisories RHSA-2026:54071

  • bind SLE Module for Server Applications 15 SP7, SLE Module for Basesystem 15 SP7 9.20.26-150700.3.29.1
  • bind SLES for SAP 15 SP6, SLES 15 SP6-LTSS 9.18.50-150600.3.32.1

suse advisories SUSE-SU-2026:3452-1SUSE-SU-2026:3426-1

  • bind openSUSE Leap 16.0 9.20.26-160000.1.1
  • bind openSUSE Tumbleweed 9.20.26-1.1

opensuse advisories openSUSE-SU-2026:21489-1openSUSE-SU-2026:11375-1

  • bind Alpine 3.24, Alpine 3.23, Alpine 3.22 9.20.26-r0

alpine advisories ALPINE-CVE-2026-10822

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 9.20.26-1

azure linux advisories AZL-93114

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-2026-10822 updated cvss 6.5

bind: bind9: Key Record using PRIVATEDNS algorithm may lead to exit

  • 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, bind9.16, bind-libs, bind-utils, bind-chroot, +14 more Red Hat Enterprise Linux 9 bind, dhcp, bind9.18, bind-libs, bind-utils, dhcp-relay, +11 more Red Hat Enterprise Linux 10 bind Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    +1 more products
    Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images bind 9.20.26-0.1.hum1, bind-libs 9.20.26-0.1.hum1, bind-utils 9.20.26-0.1.hum1, bind-chroot 9.20.26-0.1.hum1, bind-dnssec-utils 9.20.26-0.1.hum1
    fixed: vendor fix RHSA-2026:54071

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
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • ISC BIND 9

Classification

Weakness
  • CWE-617 Reachable Assertion
  • CWE-1284 Improper Validation of Specified Quantity in Input

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.