Skip to content
Fencer Vulns
medium 5.3

CVE-2022-2795 json

Processing large delegations may severely degrade resolver performance

published 2022-09-21 4 y ago modified 2026-09-01 2 mo ago also EUVD-2022-35036

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

By flooding the target resolver with queries exploiting this flaw an attacker can significantly impair the resolver's performance, effectively denying legitimate clients access to the DNS resolution service.

Patch / fix

  • isc bind 9.11.37, 9.16.32, 9.19.4
  • bind9 Debian 14, Debian 13, Debian 12 1:9.18.7-1

debian advisories DEBIAN-CVE-2022-2795

  • bind9 Ubuntu 18.04 LTS 1:9.11.3+dfsg-1ubuntu1.18
  • bind9 Ubuntu 20.04 LTS 1:9.16.1-0ubuntu2.11
  • bind9 Ubuntu 22.04 LTS 1:9.18.1-1ubuntu1.2
  • bind9 Ubuntu Pro 14.04 LTS 1:9.9.5.dfsg-3ubuntu0.19+esm7
  • bind9 Ubuntu Pro 16.04 LTS 1:9.10.3.dfsg.P4-8ubuntu1.19+esm3

ubuntu advisories UBUNTU-CVE-2022-2795

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

  • bind9.16 RHEL 8 32:9.16.23-0.14.el8
  • bind9.16-libs RHEL 8 32:9.16.23-0.14.el8
  • bind9.16-utils RHEL 8 32:9.16.23-0.14.el8
  • bind9.16-chroot RHEL 8 32:9.16.23-0.14.el8
  • bind9.16-license RHEL 8 32:9.16.23-0.14.el8
  • python3-bind9.16 RHEL 8 32:9.16.23-0.14.el8
  • bind9.16-dnssec-utils RHEL 8 32:9.16.23-0.14.el8
  • bind RHEL 8 32:9.11.36-8.el8

red hat advisories RHSA-2024:2720RHSA-2023:2792RHSA-2023:3002RHSA-2023:2261RHSA-2023:0402

  • bind SLE Module for Server Applications 15 SP4, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 9.16.33-150400.5.11.1
  • bind SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +18 more 9.16.6-150000.12.63.1
  • bind SLE Module for Server Applications 15 SP3, SLE Module for Basesystem 15 SP4, SLE Module for Basesystem 15 SP3 +2 more 9.16.6-150300.22.21.2
  • bind SLES 12 SP3-BCL, SLES 12 SP2-BCL 9.9.9P1-63.37.1
  • bind SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +4 more 9.11.22-3.43.1

suse advisories SUSE-SU-2022:3767-1SUSE-SU-2022:3729-1SUSE-SU-2022:3682-1SUSE-SU-2022:3500-1SUSE-SU-2022:3499-1

  • bind openSUSE Tumbleweed 9.18.7-1.1

opensuse advisories openSUSE-SU-2024:12356-1

  • bind9.16 AlmaLinux 8 32:9.16.23-0.14.el8
  • bind9.16-libs AlmaLinux 8 32:9.16.23-0.14.el8
  • bind9.16-utils AlmaLinux 8 32:9.16.23-0.14.el8
  • bind9.16-chroot AlmaLinux 8 32:9.16.23-0.14.el8
  • bind9.16-license AlmaLinux 8 32:9.16.23-0.14.el8
  • python3-bind9.16 AlmaLinux 8 32:9.16.23-0.14.el8
  • bind9.16-dnssec-utils AlmaLinux 8 32:9.16.23-0.14.el8
  • bind AlmaLinux 8 32:9.11.36-8.el8

almalinux advisories ALSA-2023:2792ALSA-2023:3002ALSA-2023:2261

  • bind Alpine 3.16, Alpine 3.15, Alpine 3.14 +1 more 9.16.33-r0
  • bind Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 9.18.7-r0

alpine advisories ALPINE-CVE-2022-2795

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 9.16.33-1
  • dhcp CBL-Mariner 2.0 4.4.3-2

azure linux advisories AZL-10999AZL-39992

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

  • bind Arch Linux 9.18.7-1

arch linux advisories AVG-2811

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-2022-2795 updated cvss 5.3

bind: processing large delegations may severely degrade resolver performance

  • 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 AppStream (v. 8) bind 9.11.36-8.el8, bind-sdb 9.11.36-8.el8, bind-libs 9.11.36-8.el8, bind-utils 9.11.36-8.el8, bind-chroot 9.11.36-8.el8, bind-pkcs11 9.11.36-8.el8, +13 more
    fixed: vendor fix RHSA-2023:3002
  • 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 BaseOS (v. 8) bind 9.11.36-8.el8, bind-export-libs 9.11.36-8.el8
    fixed: vendor fix RHSA-2023:3002
  • 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
  • Red Hat Enterprise Linux Client (v. 7) bind 9.11.4-26.P2.el7_9.13, bind-libs 9.11.4-26.P2.el7_9.13, bind-utils 9.11.4-26.P2.el7_9.13, bind-license 9.11.4-26.P2.el7_9.13, bind-libs-lite 9.11.4-26.P2.el7_9.13, bind-export-libs 9.11.4-26.P2.el7_9.13 Red Hat Enterprise Linux Client Optional (v. 7) bind 9.11.4-26.P2.el7_9.13, bind-sdb 9.11.4-26.P2.el7_9.13, bind-chroot 9.11.4-26.P2.el7_9.13, bind-pkcs11 9.11.4-26.P2.el7_9.13, bind-sdb-chroot 9.11.4-26.P2.el7_9.13, bind-pkcs11-libs 9.11.4-26.P2.el7_9.13, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) bind 9.11.4-26.P2.el7_9.13, bind-sdb 9.11.4-26.P2.el7_9.13, bind-chroot 9.11.4-26.P2.el7_9.13, bind-pkcs11 9.11.4-26.P2.el7_9.13, bind-sdb-chroot 9.11.4-26.P2.el7_9.13, bind-pkcs11-libs 9.11.4-26.P2.el7_9.13, +1 more
    fixed: vendor fix RHSA-2023:0402
  • Red Hat Enterprise Linux CRB (v. 8) bind9.16-libs 9.16.23-0.14.el8
    fixed: vendor fix RHSA-2023:2792
show 3 more
  • Red Hat Enterprise Linux CRB (v. 9) bind-libs 9.16.23-11.el9
    fixed: vendor fix RHSA-2023:2261
  • Red Hat Enterprise Linux Server (v. 7) bind 9.11.4-26.P2.el7_9.13, bind-libs 9.11.4-26.P2.el7_9.13, bind-utils 9.11.4-26.P2.el7_9.13, bind-chroot 9.11.4-26.P2.el7_9.13, bind-pkcs11 9.11.4-26.P2.el7_9.13, bind-license 9.11.4-26.P2.el7_9.13, +4 more Red Hat Enterprise Linux Server Optional (v. 7) bind-sdb 9.11.4-26.P2.el7_9.13, bind-sdb-chroot 9.11.4-26.P2.el7_9.13 Red Hat Enterprise Linux Workstation (v. 7) bind 9.11.4-26.P2.el7_9.13, bind-libs 9.11.4-26.P2.el7_9.13, bind-utils 9.11.4-26.P2.el7_9.13, bind-chroot 9.11.4-26.P2.el7_9.13, bind-pkcs11 9.11.4-26.P2.el7_9.13, bind-license 9.11.4-26.P2.el7_9.13, +4 more Red Hat Enterprise Linux Workstation Optional (v. 7) bind-sdb 9.11.4-26.P2.el7_9.13, bind-sdb-chroot 9.11.4-26.P2.el7_9.13
    fixed: vendor fix RHSA-2023:0402
  • 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 ICSA-25-105-08 updated cvss 2.7

ABB M2M Gateway

  • ABB M2M Gateway >=4.1.2, <=5.0.3, >=5.0.1, <=5.0.3
    affected: mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

2.29% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

  • ISC BIND9
  • isc bind

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.