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TI-2022-02590 Aliases CVE-2022-2795GHSA-9mq2-v988-m7mr

Processing large delegations may severely degrade resolver performance

Priority LOW 34Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Partial Red Hat: 14 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02291 83rd percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 14 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ISCBIND9Open Source Branches 9.0 through 9.16 9.0.0 through versions before 9.16.33; Open Source Branch 9.18 9.18.0 through versions before 9.18.7; Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions up to and including 9.11.37-S1; Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.33-S1; Development Branch 9.19 9.19.0 through versions before 9.19.5—No fix listedCNA
  • BIND9 VendorISC Affected Open Source Branches 9.0 through 9.16 9.0.0 through versions before 9.16.33; Open Source Branch 9.18 9.18.0 through versions before 9.18.7; Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions up to and including 9.11.37-S1; Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.33-S1; Development Branch 9.19 9.19.0 through versions before 9.19.5 Fixed in — No fix listed CNA

CPE configurations NVD · 33

CPEVersionsRoleVendor
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*9.0.0 to before 9.16.33; 9.18.0 to before 9.18.7; 9.19.0 to before 9.19.5VulnerableISC
cpe:2.3:a:isc:bind:9.9.3:s1:*:*:*:*:*:*9.9.3 s1VulnerableISC
cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:*9.9.3 s1VulnerableISC
cpe:2.3:a:isc:bind:9.9.12:s1:*:*:supported_preview:*:*:*9.9.12 s1VulnerableISC
cpe:2.3:a:isc:bind:9.9.13:s1:*:*:supported_preview:*:*:*9.9.13 s1VulnerableISC
cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*9.10.5 s1VulnerableISC
cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:*9.10.7 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:*9.11.3 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.5:s3:*:*:*:*:*:*9.11.5 s3VulnerableISC
cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*9.11.5 s3VulnerableISC
  • cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* Versions 9.0.0 to before 9.16.33; 9.18.0 to before 9.18.7; 9.19.0 to before 9.19.5 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.9.3:s1:*:*:*:*:*:* Versions 9.9.3 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:* Versions 9.9.3 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.9.12:s1:*:*:supported_preview:*:*:* Versions 9.9.12 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.9.13:s1:*:*:supported_preview:*:*:* Versions 9.9.13 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:* Versions 9.10.5 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:* Versions 9.10.7 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:* Versions 9.11.3 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.5:s3:*:*:*:*:*:* Versions 9.11.5 s3 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:* Versions 9.11.5 s3 Vulnerable ·ISC
Show 23 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:*9.11.5 s5VulnerableISC
cpe:2.3:a:isc:bind:9.11.5:s6:*:*:supported_preview:*:*:*9.11.5 s6VulnerableISC
cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:*9.11.6 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:*9.11.7 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:*9.11.8 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:*9.11.12 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.14-s1:*:*:*:preview:*:*:*9.11.14-s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.19-s1:*:*:*:preview:*:*:*9.11.19-s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:*9.11.21 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.27:s1:*:*:supported_preview:*:*:*9.11.27 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.29:s1:*:*:supported_preview:*:*:*9.11.29 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.35:s1:*:*:supported_preview:*:*:*9.11.35 s1VulnerableISC
cpe:2.3:a:isc:bind:9.11.37:s1:*:*:supported_preview:*:*:*9.11.37 s1VulnerableISC
cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:*9.16.8 s1VulnerableISC
cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:*9.16.11 s1VulnerableISC
cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:*9.16.13 s1VulnerableISC
cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:*9.16.21 s1VulnerableISC
cpe:2.3:a:isc:bind:9.16.32:s1:*:*:supported_preview:*:*:*9.16.32 s1VulnerableISC
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*35VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*36VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*37VulnerableFedoraproject
  • cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:* Versions 9.11.5 s5 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.5:s6:*:*:supported_preview:*:*:* Versions 9.11.5 s6 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:* Versions 9.11.6 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:* Versions 9.11.7 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:* Versions 9.11.8 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:* Versions 9.11.12 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.14-s1:*:*:*:preview:*:*:* Versions 9.11.14-s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.19-s1:*:*:*:preview:*:*:* Versions 9.11.19-s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:* Versions 9.11.21 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.27:s1:*:*:supported_preview:*:*:* Versions 9.11.27 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.29:s1:*:*:supported_preview:*:*:* Versions 9.11.29 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.35:s1:*:*:supported_preview:*:*:* Versions 9.11.35 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.11.37:s1:*:*:supported_preview:*:*:* Versions 9.11.37 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:* Versions 9.16.8 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:* Versions 9.16.11 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:* Versions 9.16.13 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:* Versions 9.16.21 s1 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:9.16.32:s1:*:*:supported_preview:*:*:* Versions 9.16.32 s1 Vulnerable ·ISC
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject

Remediation

Red Hat 5 advisories

  • RHSA-2024:2720 Released 2024-05-07 · Red Hat rating Important
    bind and dhcp security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) bind-32:9.11.36-3.el8_6.7, bind-chroot-32:9.11.36-3.el8_6.7, bind-devel-32:9.11.36-3.el8_6.7 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) bind-32:9.11.36-3.el8_6.7, bind-export-devel-32:9.11.36-3.el8_6.7, bind-export-libs-32:9.11.36-3.el8_6.7 +6
  • RHSA-2023:3002 Released 2023-05-16 · Red Hat rating Moderate
    bind security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) bind-32:9.11.36-8.el8, bind-chroot-32:9.11.36-8.el8, bind-devel-32:9.11.36-8.el8 +12
    • Red Hat Enterprise Linux BaseOS (v. 8) bind-32:9.11.36-8.el8, bind-export-devel-32:9.11.36-8.el8, bind-export-libs-32:9.11.36-8.el8
  • RHSA-2023:2792 Released 2023-05-16 · Red Hat rating Moderate
    bind9.16 security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) bind9.16-32:9.16.23-0.14.el8, bind9.16-chroot-32:9.16.23-0.14.el8, bind9.16-dnssec-utils-32:9.16.23-0.14.el8 +4
    • Red Hat Enterprise Linux CRB (v. 8) bind9.16-devel-32:9.16.23-0.14.el8, bind9.16-doc-32:9.16.23-0.14.el8, bind9.16-libs-32:9.16.23-0.14.el8
Show 2 more Red Hat advisories
  • RHSA-2023:2261 Released 2023-05-09 · Red Hat rating Moderate
    bind security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 9) bind-32:9.16.23-11.el9, bind-chroot-32:9.16.23-11.el9, bind-dnssec-doc-32:9.16.23-11.el9 +5
    • Red Hat Enterprise Linux CRB (v. 9) bind-devel-32:9.16.23-11.el9, bind-doc-32:9.16.23-11.el9, bind-libs-32:9.16.23-11.el9
  • RHSA-2023:0402 Released 2023-01-24 · Red Hat rating Moderate
    bind security update
    • Red Hat Enterprise Linux Client (v. 7) bind-32:9.11.4-26.P2.el7_9.13, bind-export-libs-32:9.11.4-26.P2.el7_9.13, bind-libs-32:9.11.4-26.P2.el7_9.13 +3
    • Red Hat Enterprise Linux Client Optional (v. 7) bind-32:9.11.4-26.P2.el7_9.13, bind-chroot-32:9.11.4-26.P2.el7_9.13, bind-devel-32:9.11.4-26.P2.el7_9.13 +8
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) bind-32:9.11.4-26.P2.el7_9.13, bind-chroot-32:9.11.4-26.P2.el7_9.13, bind-devel-32:9.11.4-26.P2.el7_9.13 +8
    • Red Hat Enterprise Linux Server (v. 7) bind-32:9.11.4-26.P2.el7_9.13, bind-chroot-32:9.11.4-26.P2.el7_9.13, bind-export-libs-32:9.11.4-26.P2.el7_9.13 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) bind-devel-32:9.11.4-26.P2.el7_9.13, bind-devel-32:9.11.4-26.P2.el7_9.13.ppc, bind-export-devel-32:9.11.4-26.P2.el7_9.13 +7
    • Red Hat Enterprise Linux Workstation (v. 7) bind-32:9.11.4-26.P2.el7_9.13, bind-chroot-32:9.11.4-26.P2.el7_9.13, bind-export-libs-32:9.11.4-26.P2.el7_9.13 +7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) bind-devel-32:9.11.4-26.P2.el7_9.13, bind-export-devel-32:9.11.4-26.P2.el7_9.13, bind-lite-devel-32:9.11.4-26.P2.el7_9.13 +3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    ISC BIND9 — FEDORA-2022-ef038365de

    4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2022-17871 Memory leak in ECDSA DNSSEC verification codePriority MEDIUM 45
    • TI-2022-17872 Memory leaks in EdDSA DNSSEC verification codePriority MEDIUM 44
    • TI-2022-02842 BIND 9 resolvers configured to answer from stale cache with zero stale-answer-client-timeout may terminate unexpectedlyPriority MEDIUM 43
    Show all 4 records → Advisory →
  • Advisory ·

    ISC BIND9 — FEDORA-2022-8268735e06

    4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2022-17871 Memory leak in ECDSA DNSSEC verification codePriority MEDIUM 45
    • TI-2022-17872 Memory leaks in EdDSA DNSSEC verification codePriority MEDIUM 44
    • TI-2022-02842 BIND 9 resolvers configured to answer from stale cache with zero stale-answer-client-timeout may terminate unexpectedlyPriority MEDIUM 43
    Show all 4 records → Advisory →
Show 2 more groups
  • Advisory ·

    ISC BIND9 — FEDORA-2022-b197d64471

    4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2022-17871 Memory leak in ECDSA DNSSEC verification codePriority MEDIUM 45
    • TI-2022-17872 Memory leaks in EdDSA DNSSEC verification codePriority MEDIUM 44
    • TI-2022-02842 BIND 9 resolvers configured to answer from stale cache with zero stale-answer-client-timeout may terminate unexpectedlyPriority MEDIUM 43
    Show all 4 records → Advisory →
  • Advisory ·

    ISC BIND9 — DSA-5235

    4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2022-17871 Memory leak in ECDSA DNSSEC verification codePriority MEDIUM 45
    • TI-2022-17872 Memory leaks in EdDSA DNSSEC verification codePriority MEDIUM 44
    • TI-2022-02842 BIND 9 resolvers configured to answer from stale cache with zero stale-answer-client-timeout may terminate unexpectedlyPriority MEDIUM 43
    Show all 4 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:2792, RHSA-2023:3002
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:2261
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2024:2720
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2023:3002
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2024:2720
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2023:2792
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2023:2261
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2023:0402
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2023:0402
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2023:0402
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2023:0402
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2023:0402
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2023:0402
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2023:0402
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-2795
  2. 2026-10-03 Alias added: GHSA-9mq2-v988-m7mr

References

Patch 2

Advisory 6

  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
  • TI-2021-07476 A second vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack CVSS 3.1CRITICAL 9.8
  • TI-2023-27773 The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance… CVSS 3.1HIGH 7.5
  • TI-2020-06910 A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c CVSS 3.1HIGH 7.5
  • TI-2016-02320 buffer.c in named in ISC BIND 9 before 9.9.9-P3, 9.10.x before 9.10.4-P3, and 9.11.x… CVSS 3.0HIGH 7.5
See all 192 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences