Description
To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chunk of memory pointing to the cache element that can be cleaned up is first allocated and then queued for later processing. It was discovered that if the resolver is continuously processing query patterns triggering this type of cache-database maintenance, `named` may not be able to handle the cleanup events in a timely manner. This in turn enables the list of queued cleanup events to grow infinitely large over time, allowing the configured `max-cache-size` limit to be significantly exceeded.
This issue affects BIND 9 versions 9.16.0 through 9.16.45 and 9.16.8-S1 through 9.16.45-S1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND 9 | 9.16.0 – ≤ 9.16.45, 9.16.8-S1 – ≤ 9.16.45-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 | 1:9.17.19-1 | — |
| Debian 13 | bind9 | 1:9.17.19-1 | — |
| Debian 12 | bind9 | 1:9.17.19-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | bind9 | 1:9.16.48-0ubuntu0.20.04.1 | USN-6642-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bind +9 | 32:9.16.23-14.el9_3.4 | RHSA-2024:2551, RHSA-2024:1789 |
| RHEL 9 | bind-dyndb-ldap | 11.9-8.el9_3.3 | RHSA-2024:2551, RHSA-2024:1789 |
| RHEL 8 | bind9.16 +8 | 32:9.16.23-0.16.el8_9.2 | RHSA-2024:1781 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | bind +9 | 32:9.16.23-11.el9_2.4 | RHSA-2024:1803 |
| RHEL 9.2 EUS | bind-dyndb-ldap | 11.9-8.el9_2.2 | RHSA-2024:1803 |
| RHEL 9.0 EUS | bind +8 | 32:9.16.23-1.el9_0.5 | RHSA-2024:1800 |
| RHEL 9.0 EUS | bind-dyndb-ldap | 11.9-7.el9_0.1 | RHSA-2024:1800 |
| RHEL 8.8 EUS | bind9.16 +8 | 32:9.16.23-0.14.el8_8.4 | RHSA-2024:1648 |
| RHEL 8.6 EUS | bind9.16 +8 | 32:9.16.23-0.7.el8_6.5 | RHSA-2024:1647 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | bind +9 | 32:9.16.23-14.el9_3.4 | ALSA-2024:2551, ALSA-2024:1789 |
| AlmaLinux 9 | bind-dyndb-ldap | 11.9-8.el9_3.3.alma.1 | ALSA-2024:2551, ALSA-2024:1789 |
| AlmaLinux 8 | bind9.16 +8 | 32:9.16.23-0.16.el8_9.2.alma.1 | ALSA-2024:1781 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | bind | 2:9.16.23-18.el9_4.1 | RLSA-2024:2551 |
| Rocky Linux 9 | bind-dyndb-ldap | 11.9-9.el9_4 | RLSA-2024:2551 |
| Rocky Linux 8 | bind9.16 | 2:9.16.23-0.16.el8_9.2 | RLSA-2024:1781 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLES 15 SP5 | bind | 9.16.48-150500.8.16.1 | SUSE-SU-2024:0574-1 |
| SLES 15 SP4 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SLES 15 SP3 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLES 15 SP2 | bind | 9.16.6-150000.12.74.2 | SUSE-SU-2024:2033-1 |
| SLES 15 SP2 | libuv | 1.18.0-150000.3.2.1 | SUSE-SU-2024:2033-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP4 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SLES for SAP 15 SP3 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLES for SAP 15 SP2 | bind | 9.16.6-150000.12.74.2 | SUSE-SU-2024:2033-1 |
| SLES for SAP 15 SP2 | libuv | 1.18.0-150000.3.2.1 | SUSE-SU-2024:2033-1 |
| SLE HPC 15 SP4 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SLE HPC 15 SP3 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLE HPC 15 SP2 | bind | 9.16.6-150000.12.74.2 | SUSE-SU-2024:2033-1 |
| SLE HPC 15 SP2 | libuv | 1.18.0-150000.3.2.1 | SUSE-SU-2024:2033-1 |
| SUSE Manager Server 4.3 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SUSE Manager Proxy 4.3 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SUSE Manager Client Tools for SLE Micro 5 | bind | 9.16.6-150000.12.74.2 | SUSE-SU-2024:2033-1 |
| SUSE Manager Client Tools for SLE Micro 5 | libuv | 1.18.0-150000.3.2.1 | SUSE-SU-2024:2033-1 |
| SUSE Enterprise Storage 7.1 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.18.24-1.1 | openSUSE-SU-2024:13687-1 |
| openSUSE Leap 15.5 | bind | 9.16.48-150500.8.16.1 | SUSE-SU-2024:0574-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.18.24-r0 | — |
| Alpine v3.23 | bind | 9.18.24-r0 | — |
| Alpine v3.22 | bind | 9.18.24-r0 | — |
| Alpine v3.21 | bind | 9.18.24-r0 | — |
| Alpine v3.20 | bind | 9.18.24-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | bind | 9.18.24-r0 | — |
| Alpine v3.18 | bind | 9.18.24-r0 | — |
| Alpine v3.17 | bind | 9.18.24-r0 | — |
| Alpine v3.16 | bind | 9.16.48-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | bind +17 | 32:9.16.48-1.amzn2023.0.1 | ALAS2023-2024-550 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | bind | 9.19.21-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bind +9 | 32:9.16.23-14.el9_3.4 | ELSA-2024-2551, ELSA-2024-1789 |
| Oracle Linux 9 | bind-dyndb-ldap | 11.9-8.el9_3.3 | ELSA-2024-2551, ELSA-2024-1789 |
| Oracle Linux 8 | bind9.16 +8 | 32:9.16.23-0.16.el8_9.2 | ELSA-2024-1781 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | bind | 9.18.24-r0 | — |
Advisories 28
- ALSA-2024:2551 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:1789 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:1781 Important: bind9.16 security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2024-0386 Internet Systems Consortium BIND: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Oct 25, 2026
- RHSA-2024:2551 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1803 Red Hat Security Advisory: bind and bind-dyndb-ldap security updates Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1789 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1800 Red Hat Security Advisory: bind and bind-dyndb-ldap security updates Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1781 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1648 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1647 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- USN-6642-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- RLSA-2024:2551 Important: bind security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:1781 Important: bind9.16 security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2024:2033-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0590-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13687-1 bind-9.18.24-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1982-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0574-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-1307 Red Hat OpenShift Service Mesh Containers: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 5, 2025
- WID-SEC-2024-1248 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 21, 2024
- NCSC-2024-0433 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Nov 12, 2024
- SSA-915275 SSA-915275: Multiple Vulnerabilities in SINEC INS Before V1.0 SP2 Update 3 Siemens ProductCERT · Nov 12, 2024
- ICSA-24-319-08 Siemens SINEC INS CISA ICS & IT advisories · Nov 12, 2024
- ELSA-2024-2551 Important: bind security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 7, 2024
- ELSA-2024-1789 Important: bind security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Apr 11, 2024
- ELSA-2024-1781 Important: bind9.16 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 11, 2024
- ALAS2023-2024-550 Important: bind security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 5, 2024
References
- CVE-2023-6516 vendor-advisory
- http://www.openwall.com/lists/oss-security/2024/02/13/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/
- https://security.netapp.com/advisory/ntap-20240503-0008/