Description
It is possible to construct a zone such that some queries to it will generate responses containing numerous records in the Additional section. An attacker sending many such queries can cause either the authoritative server itself or an independent resolver to use disproportionate resources processing the queries. Zones will usually need to have been deliberately crafted to attack this exposure.
This issue affects BIND 9 versions 9.11.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, 9.11.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.50-S1, and 9.18.11-S1 through 9.18.32-S1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND 9 | 9.11.0 – ≤ 9.11.37, 9.16.0 – ≤ 9.16.50, 9.18.0 – ≤ 9.18.32, 9.20.0 – ≤ 9.20.4, 9.21.0 – ≤ 9.21.3, 9.11.3-S1 – ≤ 9.11.37-S1, 9.16.8-S1 – ≤ 9.16.50-S1, 9.18.11-S1 – ≤ 9.18.32-S1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | bind9 | 1:9.20.5-1 | — |
| Debian 13 | bind9 | 1:9.20.5-1 | — |
| Debian 12 | bind9 | 1:9.18.33-1~deb12u2 | DSA-5854-1 |
| Debian 11 | bind9 | 1:9.16.50-1~deb11u3 | DLA-4050-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | isc-dhcp | No fix yet | — |
| Ubuntu 25.10 | isc-dhcp | No fix yet | — |
| Ubuntu 24.04 LTS | bind9 | 1:9.18.30-0ubuntu0.24.04.2 | USN-7241-1 |
| Ubuntu 24.04 LTS | isc-dhcp | No fix yet | — |
| Ubuntu 22.04 LTS | bind9 | 1:9.18.30-0ubuntu0.22.04.2 | USN-7241-1 |
| Ubuntu 22.04 LTS | bind9-libs | No fix yet | — |
| Ubuntu 20.04 LTS | bind9 | 1:9.18.30-0ubuntu0.20.04.2 | USN-7241-1 |
| Ubuntu 20.04 LTS | bind9-libs | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | isc-dhcp | No fix yet | — |
| Ubuntu Pro 18.04 LTS | bind9 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bind +9 | 32:9.16.23-24.el9_5.3 | RHSA-2025:1681 |
| RHEL 9 | bind9.18 +6 | 32:9.18.29-1.el9_5.1 | RHSA-2025:1670 |
| RHEL 8 | bind +16 | 32:9.11.36-16.el8_10.4 | RHSA-2025:1675 |
| RHEL 8 | bind9.16 +8 | 32:9.16.23-0.22.el8_10.2 | RHSA-2025:1676 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | bind +9 | 32:9.16.23-18.el9_4.9 | RHSA-2025:1669 |
| RHEL 9.2 EUS | bind +9 | 32:9.16.23-11.el9_2.8 | RHSA-2025:1665 |
| RHEL 9.0 E4S | bind +7 | 32:9.16.23-1.el9_0.10 | RHSA-2025:1664 |
| RHEL 8.8 EUS | bind +16 | 32:9.11.36-8.el8_8.7 | RHSA-2025:1666 |
| RHEL 8.8 EUS | bind9.16 +8 | 32:9.16.23-0.14.el8_8.6 | RHSA-2025:1678 |
| RHEL 8.6 TUS | bind +16 | 32:9.11.36-3.el8_6.10 | RHSA-2025:1684 |
| RHEL 8.6 TUS | bind9.16 +4 | 32:9.16.23-0.7.el8_6.8 | RHSA-2025:1679 |
| RHEL 8.6 E4S | bind +16 | 32:9.11.36-3.el8_6.10 | RHSA-2025:1684 |
| RHEL 8.6 E4S | bind9.16 +4 | 32:9.16.23-0.7.el8_6.8 | RHSA-2025:1679 |
| RHEL 8.6 AUS | bind +16 | 32:9.11.36-3.el8_6.10 | RHSA-2025:1684 |
| RHEL 8.6 AUS | bind9.16 +4 | 32:9.16.23-0.7.el8_6.8 | RHSA-2025:1679 |
| RHEL 8.4 TUS | bind +16 | 32:9.11.26-4.el8_4.7 | RHSA-2025:1691 |
| RHEL 8.4 E4S | bind +16 | 32:9.11.26-4.el8_4.7 | RHSA-2025:1691 |
| RHEL 8.4 AUS | bind +16 | 32:9.11.26-4.el8_4.7 | RHSA-2025:1691 |
| RHEL 8.2 AUS | bind +16 | 32:9.11.13-6.el8_2.10 | RHSA-2025:1687 |
| RHEL 7.7 AUS | bind +15 | 32:9.11.4-9.P2.el7_7.8 | RHSA-2025:1674 |
| RHEL 7 ELS | bind +15 | 32:9.11.4-26.P2.el7_9.18 | RHSA-2025:1718 |
| RHEL 6 ELS | bind +5 | 32:9.8.2-0.68.rc1.el6_10.15 | RHSA-2025:1685 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | bind +9 | 32:9.16.23-24.el9_5.3 | ALSA-2025:1681 |
| AlmaLinux 9 | bind9.18 +6 | 32:9.18.29-1.el9_5.1 | ALSA-2025:1670 |
| AlmaLinux 8 | bind +16 | 32:9.11.36-16.el8_10.4 | ALSA-2025:1675 |
| AlmaLinux 8 | bind9.16 +8 | 32:9.16.23-0.22.el8_10.2 | ALSA-2025:1676 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | bind | 2:9.16.23-24.el9_5.3 | RLSA-2025:1681 |
| Rocky Linux 9 | bind9.18 | 2:9.18.29-1.el9_5.1 | RLSA-2025:1670 |
| Rocky Linux 8 | bind | 2:9.11.36-16.el8_10.4 | RLSA-2025:1675 |
| Rocky Linux 8 | bind9.16 | 2:9.16.23-0.22.el8_10.2 | RLSA-2025:1676 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | bind | 9.20.9-150700.3.3.1 | SUSE-SU-2025:01787-1 |
| SLES 15 SP6 | bind | 9.16.6-150300.22.50.1 | SUSE-SU-2025:0427-1, SUSE-SU-2025:0355-1 |
| SLES 15 SP5 | bind | 9.16.50-150500.8.24.1 | SUSE-SU-2025:0359-1 |
| SLES 15 SP4 | bind | 9.16.50-150400.5.46.1 | SUSE-SU-2025:0384-1 |
| SLES 15 SP3 | bind | 9.16.6-150300.22.50.1 | SUSE-SU-2025:0427-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | bind | 9.11.22-3.60.2 | SUSE-SU-2025:0389-1 |
| SLES for SAP 15 SP5 | bind | 9.16.50-150500.8.24.1 | SUSE-SU-2025:0359-1 |
| SLES for SAP 15 SP4 | bind | 9.16.50-150400.5.46.1 | SUSE-SU-2025:0384-1 |
| SLES for SAP 15 SP3 | bind | 9.16.6-150300.22.50.1 | SUSE-SU-2025:0427-1 |
| SLE Micro 5.5 | bind | 9.16.50-150500.8.24.1 | SUSE-SU-2025:0359-1 |
| SLE HPC 15 SP5 | bind | 9.16.50-150500.8.24.1 | SUSE-SU-2025:0359-1 |
| SLE HPC 15 SP4 | bind | 9.16.50-150400.5.46.1 | SUSE-SU-2025:0384-1 |
| SLE HPC 15 SP3 | bind | 9.16.6-150300.22.50.1 | SUSE-SU-2025:0427-1 |
| SUSE Manager Server 4.3 | bind | 9.16.50-150400.5.46.1 | SUSE-SU-2025:0384-1 |
| SUSE Manager Proxy 4.3 | bind | 9.16.50-150400.5.46.1 | SUSE-SU-2025:0384-1 |
| SUSE Manager Client Tools for SLE Micro 5 | bind | 9.16.6-150000.12.80.1 | SUSE-SU-2025:0337-1 |
| SUSE Enterprise Storage 7.1 | bind | 9.16.6-150300.22.50.1 | SUSE-SU-2025:0427-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.20.5-1.1 | openSUSE-SU-2025:14719-1 |
| openSUSE Leap 15.6 | bind | 9.18.33-150600.3.6.1 | SUSE-SU-2025:0355-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.18.33-r0 | — |
| Alpine v3.23 | bind | 9.18.33-r0 | — |
| Alpine v3.22 | bind | 9.18.33-r0 | — |
| Alpine v3.21 | bind | 9.18.33-r0 | — |
| Alpine v3.20 | bind | 9.18.33-r0 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | bind | 9.18.33-r0 | — |
| Alpine v3.18 | bind | 9.18.33-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | bind +7 | 32:9.18.33-1.amzn2023.0.2 | ALAS2023-2025-838 |
| Amazon Linux 2 | bind +15 | 32:9.11.4-26.P2.amzn2.13.11 | ALAS2-2025-2751 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | bind | 9.20.5-1 | — |
| Azure Linux 2 (CBL-Mariner) | bind | 9.16.50-2 | — |
| Azure Linux 2 (CBL-Mariner) | dhcp | 4.4.3.P1-3 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bind +9 | 32:9.16.23-24.0.1.el9_5.3 | ELSA-2025-1681 |
| Oracle Linux 9 | bind9.18 +6 | 32:9.18.29-1.el9_5.1 | ELSA-2025-1670 |
| Oracle Linux 8 | bind +16 | 32:9.11.36-16.el8_10.4 | ELSA-2025-1675 |
| Oracle Linux 8 | bind9.16 +8 | 32:9.16.23-0.22.el8_10.2 | ELSA-2025-1676 |
| Oracle Linux 7 | bind +15 | 32:9.11.4-26.0.3.P2.el7_9.16 | ELSA-2025-1718 |
Advisories 43
- ALSA-2025:1670 Important: bind9.18 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:1681 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:1675 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:1676 Important: bind9.16 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:1718 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1687 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1691 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1685 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1684 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1679 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1681 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1676 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1678 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1675 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1674 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1670 Red Hat Security Advisory: bind9.18 security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1669 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1666 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1665 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:1664 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- WID-SEC-2025-0217 Internet Systems Consortium BIND: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · May 17, 2026
- USN-7241-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5854-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4050-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2025:1681 Important: bind security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2025:1676 Important: bind9.16 security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2025:1675 Important: bind security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2025:1670 Important: bind9.18 security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2025:0337-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0384-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0355-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0389-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:01787-1 Security update for bind SUSE / openSUSE Security Updates · May 31, 2025
- openSUSE-SU-2025:14719-1 bind-9.20.5-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2025:0427-1 Security update for bind SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2025:0359-1 Security update for bind SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2025-1718 Important: bind security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 10, 2025
- ELSA-2025-1670 Important: bind9.18 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 21, 2025
- ELSA-2025-1681 Important: bind security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 20, 2025
- ELSA-2025-1676 Important: bind9.16 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 20, 2025
- ELSA-2025-1675 Important: bind security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 20, 2025
- ALAS2023-2025-838 Important: bind security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 5, 2025
- ALAS2-2025-2751 Important: bind security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 4, 2025
References
- CVE-2024-11187 vendor-advisory