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Fencer Vulns
high 7.5

CVE-2022-3094 in the critical feed json

An UPDATE message flood may cause named to exhaust all available memory

published 2023-01-25 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-42523

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
13.2%
EPSS 13.2% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

Sending a flood of dynamic DNS updates may cause `named` to allocate large amounts of memory. This, in turn, may cause `named` to exit due to a lack of free memory. We are not aware of any cases where this has been exploited.

Memory is allocated prior to the checking of access permissions (ACLs) and is retained during the processing of a dynamic update from a client whose access credentials are accepted. Memory allocated to clients that are not permitted to send updates is released immediately upon rejection. The scope of this vulnerability is limited therefore to trusted clients who are permitted to make dynamic zone changes.

If a dynamic update is REFUSED, memory will be released again very quickly. Therefore it is only likely to be possible to degrade or stop `named` by sending a flood of unaccepted dynamic updates comparable in magnitude to a query flood intended to achieve the same detrimental outcome.

BIND 9.11 and earlier branches are also affected, but through exhaustion of internal resources rather than memory constraints. This may reduce performance but should not be a significant problem for most servers. Therefore we don't intend to address this for BIND versions prior to BIND 9.16. This issue affects BIND 9 versions 9.16.0 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.8-S1 through 9.16.36-S1.

Patch / fix

  • isc bind 9.16.37, 9.18.11, 9.19.9
  • bind9 Debian 14, Debian 13, Debian 12 1:9.18.11-1

debian advisories DEBIAN-CVE-2022-3094

  • bind9 Ubuntu 20.04 LTS 1:9.16.1-0ubuntu2.12
  • bind9 Ubuntu 22.04 LTS 1:9.18.1-1ubuntu1.3

ubuntu advisories UBUNTU-CVE-2022-3094

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 32:9.11.36-11.el8_9
  • bind-sdb RHEL 8 32:9.11.36-11.el8_9
  • bind-libs RHEL 8 32:9.11.36-11.el8_9
  • bind-utils RHEL 8 32:9.11.36-11.el8_9
  • bind-chroot RHEL 8 32:9.11.36-11.el8_9
  • bind-pkcs11 RHEL 8 32:9.11.36-11.el8_9
  • bind-license RHEL 8 32:9.11.36-11.el8_9
  • python3-bind RHEL 8 32:9.11.36-11.el8_9

red hat advisories RHSA-2024:2720RHSA-2024:1406RHSA-2023:7177RHSA-2023:2792RHSA-2023:2261

  • bind Multi Linux Manager Tools SLE-Micro-5, Manager Client Tools for SLE Micro 5 9.16.6-150000.12.91.1
  • bind SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Real Time 15 SP3 +8 more 9.16.6-150300.22.27.1
  • bind SLE Module for Server Applications 15 SP4, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 9.16.37-150400.5.17.1

suse advisories SUSE-SU-2026:3517-1SUSE-SU-2023:0427-1SUSE-SU-2023:0341-1

  • bind openSUSE Tumbleweed 9.18.11-1.1

opensuse advisories openSUSE-SU-2024:12641-1

  • bind AlmaLinux 8 32:9.11.36-11.el8_9
  • bind-sdb AlmaLinux 8 32:9.11.36-11.el8_9
  • bind-libs AlmaLinux 8 32:9.11.36-11.el8_9
  • bind-utils AlmaLinux 8 32:9.11.36-11.el8_9
  • bind-chroot AlmaLinux 8 32:9.11.36-11.el8_9
  • bind-pkcs11 AlmaLinux 8 32:9.11.36-11.el8_9
  • bind-license AlmaLinux 8 32:9.11.36-11.el8_9
  • python3-bind AlmaLinux 8 32:9.11.36-11.el8_9

almalinux advisories ALSA-2023:7177ALSA-2023:2792ALSA-2023:2261

  • bind Alpine 3.16, Alpine 3.15, Alpine 3.14 9.16.37-r0
  • bind Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 9.18.11-r0

alpine advisories ALPINE-CVE-2022-3094

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 CBL-Mariner 2.0 9.16.37-2

azure linux advisories AZL-13204

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-2022-3094 updated cvss 6.5

bind: flooding with UPDATE requests may lead to DoS

  • Red Hat Enterprise Linux 6 bind, bind-sdb, bind-libs, bind-utils, bind-chroot
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 bind, bind-sdb, bind-libs, bind-utils, bind-chroot, bind-pkcs11, +6 more
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) bind 9.11.36-11.el8_9, bind-sdb 9.11.36-11.el8_9, bind9.16 9.16.23-0.14.el8, bind-libs 9.11.36-11.el8_9, bind-utils 9.11.36-11.el8_9, bind-chroot 9.11.36-11.el8_9, +13 more
    fixed: vendor fix RHSA-2023:2792
  • Red Hat Enterprise Linux AppStream (v. 9) bind 9.16.23-11.el9, bind-libs 9.16.23-11.el9, bind-utils 9.16.23-11.el9, bind-chroot 9.16.23-11.el9, bind-license 9.16.23-11.el9, python3-bind 9.16.23-11.el9, +1 more
    fixed: vendor fix RHSA-2023:2261
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) bind 9.11.36-3.el8_6.7, bind-sdb 9.11.36-3.el8_6.7, bind-libs 9.11.36-3.el8_6.7, bind-utils 9.11.36-3.el8_6.7, bind-chroot 9.11.36-3.el8_6.7, bind-pkcs11 9.11.36-3.el8_6.7, +6 more
    fixed: vendor fix RHSA-2024:2720
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) bind 9.11.36-8.el8_8.3, bind-sdb 9.11.36-8.el8_8.3, bind-libs 9.11.36-8.el8_8.3, bind-utils 9.11.36-8.el8_8.3, bind-chroot 9.11.36-8.el8_8.3, bind-pkcs11 9.11.36-8.el8_8.3, +6 more
    fixed: vendor fix RHSA-2024:1406
  • Red Hat Enterprise Linux BaseOS (v. 8) bind 9.11.36-11.el8_9, bind-export-libs 9.11.36-11.el8_9
    fixed: vendor fix RHSA-2023:7177
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) dhcp 4.3.6-47.el8_6.2, bind 9.11.36-3.el8_6.7, dhcp-libs 4.3.6-47.el8_6.2, dhcp-relay 4.3.6-47.el8_6.2, dhcp-client 4.3.6-47.el8_6.2, dhcp-common 4.3.6-47.el8_6.2, +2 more
    fixed: vendor fix RHSA-2024:2720
show 4 more
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) bind 9.11.36-8.el8_8.3, bind-export-libs 9.11.36-8.el8_8.3
    fixed: vendor fix RHSA-2024:1406
  • Red Hat Enterprise Linux CRB (v. 8) bind9.16-libs 9.16.23-0.14.el8
    fixed: vendor fix RHSA-2023:2792
  • Red Hat Enterprise Linux CRB (v. 9) bind-libs 9.16.23-11.el9
    fixed: vendor fix RHSA-2023:2261
  • Red Hat Enterprise Linux 9 dhcp, dhcp-relay, dhcp-client, dhcp-common, dhcp-server
    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
19 mo ago

Exploit prediction

13.21% chance of exploitation in the next 30 days, higher than 96% 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
NVD 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.