Description
BIND servers that are configured to use TKEY-based authentication via GSS-API tokens are vulnerable to excessive memory consumption when receiving and processing maliciously-constructed packets. Typically these servers will be found in Active Directory integrated DNS deployments and/or Kerberos-secured DNS environments.
This issue affects BIND 9 versions 9.0.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.9.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND 9 | 9.0.0 – ≤ 9.16.50, 9.18.0 – ≤ 9.18.48, 9.20.0 – ≤ 9.20.22, 9.21.0 – ≤ 9.21.21, 9.9.3-S1 – ≤ 9.16.50-S1, 9.18.11-S1 – ≤ 9.18.48-S1, 9.20.9-S1 – ≤ 9.20.22-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 | 1:9.20.23-1 | — |
| Debian 13 | bind9 | 1:9.20.23-1~deb13u1 | — |
| Debian 12 | bind9 | 1:9.18.49-1~deb12u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | bind9 | 1:9.20.18-1ubuntu2.1 | — |
| Ubuntu 25.10 | bind9 | 1:9.20.11-1ubuntu2.4 | — |
| Ubuntu 24.04 LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.5 | — |
| Ubuntu 22.04 LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.4 | — |
| Ubuntu 22.04 LTS | bind9-libs | No fix yet | — |
| Ubuntu 20.04 LTS | bind9-libs | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | bind9 | 1:9.18.30-0ubuntu0.20.04.2+esm2 | USN-8682-1 |
| Ubuntu Pro 18.04 LTS | bind9 | 1:9.11.3+dfsg-1ubuntu1.19+esm5 | USN-8682-1 |
| Ubuntu Pro 16.04 LTS | bind9 | 1:9.10.3.dfsg.P4-8ubuntu1.19+esm10 | USN-8682-1 |
| Ubuntu Pro 14.04 LTS | bind9 | 1:9.9.5.dfsg-3ubuntu0.19+esm14 | USN-8682-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | bind +7 | 32:9.18.33-15.el10_2.2 | RHSA-2026:24338 |
| RHEL 9 | bind +9 | 32:9.16.23-40.el9_8.2 | RHSA-2026:24367 |
| RHEL 9 | bind9.18 +6 | 32:9.18.29-14.el9_8.2 | RHSA-2026:24368 |
| RHEL 8 | bind +16 | 32:9.11.36-16.el8_10.8 | RHSA-2026:24339 |
| RHEL 8 | bind9.16 +8 | 32:9.16.23-0.22.el8_10.6 | RHSA-2026:23360 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.6 EUS | bind +3 | 32:9.16.23-31.el9_6.4 | RHSA-2026:55441 |
| RHEL 9.4 E4S | bind +7 | 32:9.16.23-18.el9_4.12 | RHSA-2026:57189 |
| RHEL 8.8 TUS | bind9.16 +2 | 32:9.16.23-0.14.el8_8.9 | RHSA-2026:79160 |
| RHEL 8.8 E4S | bind9.16 +2 | 32:9.16.23-0.14.el8_8.9 | RHSA-2026:79160 |
| RHEL 8.6 EUS Long Life | bind9.16 +1 | 32:9.16.23-0.7.el8_6.11 | RHSA-2026:80501 |
| RHEL 8.6 AUS | bind9.16 +1 | 32:9.16.23-0.7.el8_6.11 | RHSA-2026:80501 |
| RHEL 7 ELS | bind +6 | 32:9.11.4-26.P2.el7_9.21 | RHSA-2026:60383 |
| Red Hat Hardened Images 1 | bind +6 | 9.18.49-1.hum1 | RHSA-2026:20334 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | bind +7 | 32:9.18.33-15.el10_2.2 | ALSA-2026:24338 |
| AlmaLinux 9 | bind +9 | 32:9.16.23-40.el9_8.2 | ALSA-2026:24367 |
| AlmaLinux 9 | bind9.18 +6 | 32:9.18.29-14.el9_8.2 | ALSA-2026:24368 |
| AlmaLinux 8 | bind +16 | 32:9.11.36-16.el8_10.8 | ALSA-2026:24339 |
| AlmaLinux 8 | bind9.16 +8 | 32:9.16.23-0.22.el8_10.6 | ALSA-2026:23360 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | bind | 2:9.18.33-15.el10_2.2 | RLSA-2026:24338 |
| Rocky Linux 9 | bind | 2:9.16.23-40.el9_8.2 | RLSA-2026:24367 |
| Rocky Linux 9 | bind9.18 | 2:9.18.29-14.el9_8.2 | RLSA-2026:24368 |
| Rocky Linux 8 | bind | 2:9.11.36-16.el8_10.8 | RLSA-2026:24339 |
| Rocky Linux 8 | bind9.16 | 2:9.16.23-0.22.el8_10.6 | RLSA-2026:23360 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | bind | 9.16.6-150300.22.59.1 | SUSE-SU-2026:2779-1, SUSE-SU-2026:2673-1 |
| SLES 15 SP6 | bind | 9.16.6-150300.22.59.1 | SUSE-SU-2026:2779-1, SUSE-SU-2026:2676-1 |
| SLES 15 SP5 | bind | 9.16.50-150500.8.38.1 | SUSE-SU-2026:2616-1 |
| SLES 15 SP4 | bind | 9.16.50-150400.5.62.1 | SUSE-SU-2026:2617-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | bind | 9.20.23-160000.1.1 | SUSE-SU-2026:22198-1 |
| SLES for SAP 15 SP6 | bind | 9.16.6-150300.22.59.1 | SUSE-SU-2026:2779-1, SUSE-SU-2026:2676-1 |
| SLES for SAP 15 SP5 | bind | 9.16.50-150500.8.38.1 | SUSE-SU-2026:2616-1 |
| SLES for SAP 15 SP4 | bind | 9.16.50-150400.5.62.1 | SUSE-SU-2026:2617-1 |
| SLES 16.0 | bind | 9.20.23-160000.1.1 | SUSE-SU-2026:22198-1 |
| SLE Micro 5.5 | bind | 9.16.50-150500.8.38.1 | SUSE-SU-2026:2616-1 |
| SLE HPC 15 SP5 | bind | 9.16.50-150500.8.38.1 | SUSE-SU-2026:2616-1 |
| SLE HPC 15 SP4 | bind | 9.16.50-150400.5.62.1 | SUSE-SU-2026:2617-1 |
| SUSE Multi Linux Manager Tools SLE-Micro-5 | bind | 9.16.6-150000.12.91.1 | SUSE-SU-2026:3517-1 |
| SUSE Manager Client Tools for SLE Micro 5 | bind | 9.16.6-150000.12.91.1 | SUSE-SU-2026:3517-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.20.23-1.1 | openSUSE-SU-2026:10874-1 |
| openSUSE Leap 16.0 | bind | 9.20.23-160000.1.1 | openSUSE-SU-2026:21123-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.20.23-r0 | — |
| Alpine v3.23 | bind | 9.20.23-r0 | — |
| Alpine v3.22 | bind | 9.20.23-r0 | — |
| Alpine v3.21 | bind | 9.18.49-r0 | — |
| Alpine v3.20 | bind | 9.18.49-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | bind +7 | 32:9.18.49-1.amzn2023.0.1 | ALAS2023-2026-1755 |
| Amazon Linux 2 | bind +15 | 32:9.11.4-26.P2.amzn2.13.15 | ALAS2-2026-3321 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | bind | 9.20.23-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | bind +7 | 32:9.18.33-15.0.1.el10_2.2 | ELSA-2026-24338 |
| Oracle Linux 9 | bind +9 | 32:9.16.23-40.0.1.el9_8.2 | ELSA-2026-24367 |
| Oracle Linux 9 | bind9.18 +6 | 32:9.18.29-14.el9_8.2 | ELSA-2026-24368 |
| Oracle Linux 8 | bind +16 | 32:9.11.36-16.el8_10.8 | ELSA-2026-24339 |
| Oracle Linux 8 | bind9.16 +8 | 32:9.16.23-0.22.el8_10.6 | ELSA-2026-23360 |
Advisories 39
- WID-SEC-2026-1626 Internet Systems Consortium BIND: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- ALSA-2026:24368 Important: bind9.18 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:24367 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:24338 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:24339 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:23360 Important: bind9.16 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:80501 Red Hat Security Advisory: bind9.16 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:79160 Red Hat Security Advisory: bind9.16 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:57189 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:55441 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:60383 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 12, 2026
- RHSA-2026:24368 Red Hat Security Advisory: bind9.18 security update Red Hat Security Advisories (RHSA) · Oct 12, 2026
- RHSA-2026:24339 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 12, 2026
- RHSA-2026:24367 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 12, 2026
- RHSA-2026:24338 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Oct 12, 2026
- RHSA-2026:23360 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Oct 12, 2026
- RHSA-2026:20334 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 12, 2026
- USN-8682-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Aug 27, 2026
- SUSE-SU-2026:3517-1 Security update for bind SUSE / openSUSE Security Updates · Aug 7, 2026
- ELSA-2026-24338 Important: bind security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- SUSE-SU-2026:2779-1 Security update for bind SUSE / openSUSE Security Updates · Jul 7, 2026
- SUSE-SU-2026:2673-1 Security update for bind SUSE / openSUSE Security Updates · Jul 3, 2026
- openSUSE-SU-2026:21123-1 Security update for bind SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:2676-1 Security update for bind SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:2617-1 Security update for bind SUSE / openSUSE Security Updates · Jun 25, 2026
- SUSE-SU-2026:2616-1 Security update for bind SUSE / openSUSE Security Updates · Jun 25, 2026
- SUSE-SU-2026:22198-1 Security update for bind SUSE / openSUSE Security Updates · Jun 24, 2026
- ELSA-2026-24367 Important: bind security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- ELSA-2026-24368 Important: bind9.18 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- RLSA-2026:24338 Important: bind security update Rocky Linux Security Advisories · Jun 11, 2026
- RLSA-2026:24367 Important: bind security update Rocky Linux Security Advisories · Jun 11, 2026
- RLSA-2026:24368 Important: bind9.18 security update Rocky Linux Security Advisories · Jun 11, 2026
- RLSA-2026:24339 Important: bind security update Rocky Linux Security Advisories · Jun 11, 2026
- ALAS2-2026-3321 Important: bind security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- ELSA-2026-24339 Important: bind security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 8, 2026
- RLSA-2026:23360 Important: bind9.16 security update Rocky Linux Security Advisories · Jun 6, 2026
- ELSA-2026-23360 Important: bind9.16 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 4, 2026
- openSUSE-SU-2026:10874-1 bind-9.20.23-1.1 on GA media SUSE / openSUSE Security Updates · May 29, 2026
- ALAS2023-2026-1755 Important: bind security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 26, 2026
References
- CVE-2026-3039 vendor-advisory
- https://downloads.isc.org/isc/bind9/9.18.49 patch
- https://downloads.isc.org/isc/bind9/9.20.23 patch
- https://downloads.isc.org/isc/bind9/9.21.22 patch