CVE-2023-6516
Fixed in a distro release EPSS 1%CVSS 7.5
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.
Products: ISC BIND 9, ISC BIND
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux:8 | bind9.16 | 32:9.16.23-0.16.el8_9.2.alma.1 |
| AlmaLinux:8 | bind9.16-chroot | 32:9.16.23-0.16.el8_9.2.alma.1 |
| AlmaLinux:8 | bind9.16-devel | 32:9.16.23-0.16.el8_9.2.alma.1 |
| AlmaLinux:8 | bind9.16-dnssec-utils | 32:9.16.23-0.16.el8_9.2.alma.1 |
| AlmaLinux:8 | bind9.16-doc | 32:9.16.23-0.16.el8_9.2.alma.1 |
| AlmaLinux:8 | bind9.16-libs | 32:9.16.23-0.16.el8_9.2.alma.1 |
| AlmaLinux:8 | bind9.16-license | 32:9.16.23-0.16.el8_9.2.alma.1 |
| AlmaLinux:8 | bind9.16-utils | 32:9.16.23-0.16.el8_9.2.alma.1 |
| AlmaLinux:8 | python3-bind9.16 | 32:9.16.23-0.16.el8_9.2.alma.1 |
| AlmaLinux:9 | bind | 32:9.16.23-18.el9_4.1 |
| AlmaLinux:9 | bind | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | bind-chroot | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | bind-chroot | 32:9.16.23-18.el9_4.1 |
| AlmaLinux:9 | bind-devel | 32:9.16.23-18.el9_4.1 |
| AlmaLinux:9 | bind-devel | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | bind-dnssec-doc | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | bind-dnssec-doc | 32:9.16.23-18.el9_4.1 |
| AlmaLinux:9 | bind-dnssec-utils | 32:9.16.23-18.el9_4.1 |
| AlmaLinux:9 | bind-dnssec-utils | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | bind-doc | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | bind-doc | 32:9.16.23-18.el9_4.1 |
| AlmaLinux:9 | bind-dyndb-ldap | 11.9-8.el9_3.3.alma.1 |
| AlmaLinux:9 | bind-dyndb-ldap | 11.9-9.el9_4.alma.1 |
| AlmaLinux:9 | bind-libs | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | bind-libs | 32:9.16.23-18.el9_4.1 |
| AlmaLinux:9 | bind-license | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | bind-license | 32:9.16.23-18.el9_4.1 |
| AlmaLinux:9 | bind-utils | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | bind-utils | 32:9.16.23-18.el9_4.1 |
| AlmaLinux:9 | python3-bind | 32:9.16.23-14.el9_3.4 |
| AlmaLinux:9 | python3-bind | 32:9.16.23-18.el9_4.1 |
| Alpine:v3.16 | bind | 9.16.48-r0 |
| Alpine:v3.17 | bind | 9.18.24-r0 |
| Alpine:v3.18 | bind | 9.18.24-r0 |
| Alpine:v3.19 | bind | 9.18.24-r0 |
| Alpine:v3.20 | bind | 9.18.24-r0 |
| Alpine:v3.21 | bind | 9.18.24-r0 |
| Alpine:v3.22 | bind | 9.18.24-r0 |
| Alpine:v3.23 | bind | 9.18.24-r0 |
| Alpine:v3.24 | bind | 9.18.24-r0 |
| Chainguard | bind | 9.18.24-r0 |
| Chainguard | bind-dev | 9.18.24-r0 |
| Chainguard | bind-dnssec-root | 9.18.24-r0 |
| Chainguard | bind-dnssec-tools | 9.18.24-r0 |
| Chainguard | bind-doc | 9.18.24-r0 |
| Chainguard | bind-libs | 9.18.24-r0 |
| Chainguard | bind-plugins | 9.18.24-r0 |
| Chainguard | bind-tools | 9.18.24-r0 |
| Debian:12 | bind9 | 1:9.17.19-1 |
| Debian:13 | bind9 | 1:9.17.19-1 |
| Debian:14 | bind9 | 1:9.17.19-1 |
| Red Hat:enterprise_linux:8 | bind9.16 | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-chroot | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-debuginfo | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-debugsource | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-devel | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-dnssec-utils | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-dnssec-utils-debuginfo | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-doc | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-libs | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-libs-debuginfo | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-license | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-utils | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | bind9.16-utils-debuginfo | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:8 | python3-bind9.16 | 32:9.16.23-0.16.el8_9.2 |
| Red Hat:enterprise_linux:9 | bind | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-chroot | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-chroot | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-debuginfo | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-debuginfo | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-debugsource | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-debugsource | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-devel | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-devel | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-dnssec-doc | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-dnssec-doc | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-dnssec-utils | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-dnssec-utils | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-dnssec-utils-debuginfo | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-dnssec-utils-debuginfo | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-doc | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-doc | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-dyndb-ldap | 0:11.9-8.el9_3.3 |
| Red Hat:enterprise_linux:9 | bind-dyndb-ldap | 0:11.9-9.el9_4 |
| Red Hat:enterprise_linux:9 | bind-dyndb-ldap-debuginfo | 0:11.9-8.el9_3.3 |
| Red Hat:enterprise_linux:9 | bind-dyndb-ldap-debuginfo | 0:11.9-9.el9_4 |
| Red Hat:enterprise_linux:9 | bind-dyndb-ldap-debugsource | 0:11.9-8.el9_3.3 |
| Red Hat:enterprise_linux:9 | bind-dyndb-ldap-debugsource | 0:11.9-9.el9_4 |
| Red Hat:enterprise_linux:9 | bind-libs | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-libs | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-libs-debuginfo | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-libs-debuginfo | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-license | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-license | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-utils | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-utils | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | bind-utils-debuginfo | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | bind-utils-debuginfo | 32:9.16.23-18.el9_4.1 |
| Red Hat:enterprise_linux:9 | python3-bind | 32:9.16.23-14.el9_3.4 |
| Red Hat:enterprise_linux:9 | python3-bind | 32:9.16.23-18.el9_4.1 |
| Red Hat:rhel_eus:8.6 | bind9.16 | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-chroot | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-debuginfo | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-debugsource | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-devel | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-dnssec-utils | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-dnssec-utils-debuginfo | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-doc | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-libs | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-libs-debuginfo | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-license | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-utils | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | bind9.16-utils-debuginfo | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.6 | python3-bind9.16 | 32:9.16.23-0.7.el8_6.5 |
| Red Hat:rhel_eus:8.8 | bind9.16 | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-chroot | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-debuginfo | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-debugsource | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-devel | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-dnssec-utils | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-dnssec-utils-debuginfo | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-doc | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-libs | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-libs-debuginfo | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-license | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-utils | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | bind9.16-utils-debuginfo | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:8.8 | python3-bind9.16 | 32:9.16.23-0.14.el8_8.4 |
| Red Hat:rhel_eus:9.0 | bind | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-chroot | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-debuginfo | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-debugsource | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-devel | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-dnssec-doc | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-dnssec-utils | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-dnssec-utils-debuginfo | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-dyndb-ldap | 0:11.9-7.el9_0.1 |
| Red Hat:rhel_eus:9.0 | bind-dyndb-ldap-debuginfo | 0:11.9-7.el9_0.1 |
| Red Hat:rhel_eus:9.0 | bind-dyndb-ldap-debugsource | 0:11.9-7.el9_0.1 |
| Red Hat:rhel_eus:9.0 | bind-libs | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-libs-debuginfo | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-license | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-utils | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | bind-utils-debuginfo | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.0 | python3-bind | 32:9.16.23-1.el9_0.5 |
| Red Hat:rhel_eus:9.2 | bind | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-chroot | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-debuginfo | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-debugsource | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-devel | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-dnssec-doc | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-dnssec-utils | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-dnssec-utils-debuginfo | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-doc | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-dyndb-ldap | 0:11.9-8.el9_2.2 |
| Red Hat:rhel_eus:9.2 | bind-dyndb-ldap-debuginfo | 0:11.9-8.el9_2.2 |
| Red Hat:rhel_eus:9.2 | bind-dyndb-ldap-debugsource | 0:11.9-8.el9_2.2 |
| Red Hat:rhel_eus:9.2 | bind-libs | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-libs-debuginfo | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-license | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-utils | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | bind-utils-debuginfo | 32:9.16.23-11.el9_2.4 |
| Red Hat:rhel_eus:9.2 | python3-bind | 32:9.16.23-11.el9_2.4 |
| Rocky Linux:8 | bind9.16 | 2:9.16.23-0.16.el8_9.2 |
| Rocky Linux:9 | bind | 2:9.16.23-18.el9_4.1 |
| Rocky Linux:9 | bind-dyndb-ldap | 0:11.9-9.el9_4 |
| SUSE:Enterprise Storage 7.1 | bind | 9.16.6-150300.22.44.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | bind | 9.16.6-150000.12.74.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | libuv | 1.18.0-150000.3.2.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | bind | 9.16.6-150300.22.44.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | bind | 9.16.48-150400.5.40.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | bind | 9.16.48-150400.5.40.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP5 | bind | 9.16.48-150500.8.16.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | bind | 9.16.6-150300.22.44.1 |
| SUSE:Linux Enterprise Module for Server Applications 15 SP5 | bind | 9.16.48-150500.8.16.1 |
| SUSE:Linux Enterprise Server 15 SP2-LTSS | bind | 9.16.6-150000.12.74.2 |
| SUSE:Linux Enterprise Server 15 SP2-LTSS | libuv | 1.18.0-150000.3.2.1 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | bind | 9.16.6-150300.22.44.1 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | bind | 9.16.48-150400.5.40.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | bind | 9.16.6-150000.12.74.2 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | libuv | 1.18.0-150000.3.2.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | bind | 9.16.6-150300.22.44.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | bind | 9.16.48-150400.5.40.1 |
| SUSE:Manager Client Tools for SLE Micro 5 | bind | 9.16.6-150000.12.74.2 |
| SUSE:Manager Client Tools for SLE Micro 5 | libuv | 1.18.0-150000.3.2.1 |
| SUSE:Manager Proxy 4.3 | bind | 9.16.48-150400.5.40.1 |
| SUSE:Manager Server 4.3 | bind | 9.16.48-150400.5.40.1 |
| Ubuntu:20.04:LTS | bind9 | 1:9.16.48-0ubuntu0.20.04.1 |
| Wolfi | bind | 9.18.24-r0 |
| Wolfi | bind-dev | 9.18.24-r0 |
| Wolfi | bind-dnssec-root | 9.18.24-r0 |
| Wolfi | bind-dnssec-tools | 9.18.24-r0 |
| Wolfi | bind-doc | 9.18.24-r0 |
| Wolfi | bind-libs | 9.18.24-r0 |
| Wolfi | bind-plugins | 9.18.24-r0 |
| Wolfi | bind-tools | 9.18.24-r0 |
| openSUSE:Leap 15.5 | bind | 9.16.48-150500.8.16.1 |
| openSUSE:Tumbleweed | bind | 9.18.24-1.1 |