CVE-2026-5946
Fixed in a distro release EPSS 2%CVSS 7.5
Multiple flaws have been identified in `named` related to the handling of DNS messages whose CLASS is not Internet (`IN`) — for example, `CHAOS` or `HESIOD`, or DNS messages that specify meta-classes (`ANY` or `NONE`) in the question section. Specially crafted requests reaching the affected code paths — recursion, dynamic updates (`UPDATE`), zone change notifications (`NOTIFY`), or processing of `IN`-specific record types in non-`IN` data — can cause assertion failures in `named`. This issue affects BIND 9 versions 9.11.0 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, 9.11.3-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.
Products: ISC BIND 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat OpenShift Container Platform 4.16, Red Hat Hardened Images, Red Hat Enterprise Linux 6, Red Hat OpenShift Container Platform 4
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | bind | 32:9.18.33-15.el10_2.2 |
| AlmaLinux 10 | bind-chroot | 32:9.18.33-15.el10_2.2 |
| AlmaLinux 10 | bind-devel | 32:9.18.33-15.el10_2.2 |
| AlmaLinux 10 | bind-dnssec-utils | 32:9.18.33-15.el10_2.2 |
| AlmaLinux 10 | bind-doc | 32:9.18.33-15.el10_2.2 |
| AlmaLinux 10 | bind-libs | 32:9.18.33-15.el10_2.2 |
| AlmaLinux 10 | bind-license | 32:9.18.33-15.el10_2.2 |
| AlmaLinux 10 | bind-utils | 32:9.18.33-15.el10_2.2 |
| AlmaLinux 8 | bind | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-chroot | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-devel | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-export-devel | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-export-libs | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-libs | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-libs-lite | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-license | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-lite-devel | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-pkcs11 | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-pkcs11-devel | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-pkcs11-libs | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-pkcs11-utils | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-sdb | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-sdb-chroot | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind-utils | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | bind9.16 | 32:9.16.23-0.22.el8_10.6 |
| AlmaLinux 8 | bind9.16-chroot | 32:9.16.23-0.22.el8_10.6 |
| AlmaLinux 8 | bind9.16-devel | 32:9.16.23-0.22.el8_10.6 |
| AlmaLinux 8 | bind9.16-dnssec-utils | 32:9.16.23-0.22.el8_10.6 |
| AlmaLinux 8 | bind9.16-doc | 32:9.16.23-0.22.el8_10.6 |
| AlmaLinux 8 | bind9.16-libs | 32:9.16.23-0.22.el8_10.6 |
| AlmaLinux 8 | bind9.16-license | 32:9.16.23-0.22.el8_10.6 |
| AlmaLinux 8 | bind9.16-utils | 32:9.16.23-0.22.el8_10.6 |
| AlmaLinux 8 | python3-bind | 32:9.11.36-16.el8_10.8 |
| AlmaLinux 8 | python3-bind9.16 | 32:9.16.23-0.22.el8_10.6 |
| AlmaLinux 9 | bind | 32:9.16.23-40.el9_8.2 |
| AlmaLinux 9 | bind-chroot | 32:9.16.23-40.el9_8.2 |
| AlmaLinux 9 | bind-devel | 32:9.16.23-40.el9_8.2 |
| AlmaLinux 9 | bind-dnssec-doc | 32:9.16.23-40.el9_8.2 |
| AlmaLinux 9 | bind-dnssec-utils | 32:9.16.23-40.el9_8.2 |
| AlmaLinux 9 | bind-doc | 32:9.16.23-40.el9_8.2 |
| AlmaLinux 9 | bind-libs | 32:9.16.23-40.el9_8.2 |
| AlmaLinux 9 | bind-license | 32:9.16.23-40.el9_8.2 |
| AlmaLinux 9 | bind-utils | 32:9.16.23-40.el9_8.2 |
| AlmaLinux 9 | bind9.18 | 32:9.18.29-14.el9_8.2 |
| AlmaLinux 9 | bind9.18-chroot | 32:9.18.29-14.el9_8.2 |
| AlmaLinux 9 | bind9.18-devel | 32:9.18.29-14.el9_8.2 |
| AlmaLinux 9 | bind9.18-dnssec-utils | 32:9.18.29-14.el9_8.2 |
| AlmaLinux 9 | bind9.18-doc | 32:9.18.29-14.el9_8.2 |
| AlmaLinux 9 | bind9.18-libs | 32:9.18.29-14.el9_8.2 |
| AlmaLinux 9 | bind9.18-utils | 32:9.18.29-14.el9_8.2 |
| AlmaLinux 9 | python3-bind | 32:9.16.23-40.el9_8.2 |
| Alpine 3.20 | bind | 9.18.49-r0 |
| Alpine 3.21 | bind | 9.18.49-r0 |
| Alpine 3.22 | bind | 9.20.23-r0 |
| Alpine 3.23 | bind | 9.20.23-r0 |
| Alpine 3.24 | bind | 9.20.23-r0 |
| Debian 12 | bind9 | 1:9.18.49-1~deb12u2 |
| Debian 13 | bind9 | 1:9.20.23-1~deb13u1 |
| Debian 14 | bind9 | 1:9.20.23-1 |
| Red Hat Enterprise Linux 10.2 | bind | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-chroot | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-debuginfo | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-debugsource | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-devel | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-dnssec-utils | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-dnssec-utils-debuginfo | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-doc | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-libs | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-libs-debuginfo | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-license | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-utils | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | bind-utils-debuginfo | 32:9.18.33-15.el10_2.2 |
| Red Hat Enterprise Linux 8 | bind | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-chroot | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-debuginfo | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-debugsource | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-devel | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-export-devel | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-export-libs | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-export-libs-debuginfo | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-libs | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-libs-debuginfo | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-libs-lite | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-libs-lite-debuginfo | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-license | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-lite-devel | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-pkcs11 | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-pkcs11-debuginfo | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-pkcs11-devel | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-pkcs11-libs | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-pkcs11-libs-debuginfo | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-pkcs11-utils | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-pkcs11-utils-debuginfo | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-sdb | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-sdb-chroot | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-sdb-debuginfo | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-utils | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind-utils-debuginfo | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | bind9.16 | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-chroot | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-debuginfo | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-debugsource | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-devel | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-dnssec-utils | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-dnssec-utils-debuginfo | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-doc | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-libs | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-libs-debuginfo | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-license | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-utils | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | bind9.16-utils-debuginfo | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 8 | python3-bind | 32:9.11.36-16.el8_10.8 |
| Red Hat Enterprise Linux 8 | python3-bind9.16 | 32:9.16.23-0.22.el8_10.6 |
| Red Hat Enterprise Linux 9 | bind | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-chroot | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-debuginfo | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-debugsource | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-devel | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-dnssec-doc | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-dnssec-utils | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-dnssec-utils-debuginfo | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-doc | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-libs | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-libs-debuginfo | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-license | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-utils | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind-utils-debuginfo | 32:9.16.23-40.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18 | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-chroot | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-debuginfo | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-debugsource | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-devel | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-dnssec-utils | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-dnssec-utils-debuginfo | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-doc | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-libs | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-libs-debuginfo | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-utils | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | bind9.18-utils-debuginfo | 32:9.18.29-14.el9_8.2 |
| Red Hat Enterprise Linux 9 | python3-bind | 32:9.16.23-40.el9_8.2 |
| Red Hat hummingbird 1 | bind | 0:9.18.49-1.hum1 |
| Red Hat hummingbird 1 | bind-chroot | 0:9.18.49-1.hum1 |
| Red Hat hummingbird 1 | bind-devel | 0:9.18.49-1.hum1 |
| Red Hat hummingbird 1 | bind-dnssec-utils | 0:9.18.49-1.hum1 |
| Red Hat hummingbird 1 | bind-doc | 0:9.18.49-1.hum1 |
| Red Hat hummingbird 1 | bind-libs | 0:9.18.49-1.hum1 |
| Red Hat hummingbird 1 | bind-utils | 0:9.18.49-1.hum1 |
| Red Hat rhel e4s 8.8 | bind9.16 | 32:9.16.23-0.14.el8_8.9 |
| Red Hat rhel e4s 8.8 | bind9.16-dnssec-utils | 32:9.16.23-0.14.el8_8.9 |
| Red Hat rhel e4s 8.8 | bind9.16-libs | 32:9.16.23-0.14.el8_8.9 |
| Red Hat rhel e4s 9.4 | bind | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-chroot | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-debuginfo | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-debugsource | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-dnssec-doc | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-dnssec-utils | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-dnssec-utils-debuginfo | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-libs | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-libs-debuginfo | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-license | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-utils | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | bind-utils-debuginfo | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel e4s 9.4 | python3-bind | 32:9.16.23-18.el9_4.12 |
| Red Hat rhel els 7 | bind | 32:9.11.4-26.P2.el7_9.21 |
| Red Hat rhel els 7 | bind-export-libs | 32:9.11.4-26.P2.el7_9.21 |
| Red Hat rhel els 7 | bind-libs-lite | 32:9.11.4-26.P2.el7_9.21 |
| Red Hat rhel els 7 | bind-pkcs11 | 32:9.11.4-26.P2.el7_9.21 |
| Red Hat rhel els 7 | bind-pkcs11-libs | 32:9.11.4-26.P2.el7_9.21 |
| Red Hat rhel els 7 | bind-pkcs11-utils | 32:9.11.4-26.P2.el7_9.21 |
| Red Hat rhel els 7 | bind-sdb | 32:9.11.4-26.P2.el7_9.21 |
| Red Hat rhel eus 9.6 | bind | 32:9.16.23-31.el9_6.4 |
| Red Hat rhel eus 9.6 | bind-dnssec-utils | 32:9.16.23-31.el9_6.4 |
| Red Hat rhel eus 9.6 | bind-libs | 32:9.16.23-31.el9_6.4 |
| Red Hat rhel eus 9.6 | bind-utils | 32:9.16.23-31.el9_6.4 |
| Red Hat rhel tus 8.8 | bind9.16 | 32:9.16.23-0.14.el8_8.9 |
| Red Hat rhel tus 8.8 | bind9.16-dnssec-utils | 32:9.16.23-0.14.el8_8.9 |
| Red Hat rhel tus 8.8 | bind9.16-libs | 32:9.16.23-0.14.el8_8.9 |
| Rocky Linux 10 | bind | 2:9.18.33-15.el10_2.2 |
| Rocky Linux 8 | bind | 2:9.11.36-16.el8_10.8 |
| Rocky Linux 8 | bind9.16 | 2:9.16.23-0.22.el8_10.6 |
| Rocky Linux 9 | bind | 2:9.16.23-40.el9_8.2 |
| Rocky Linux 9 | bind9.18 | 2:9.18.29-14.el9_8.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | bind | 9.16.50-150400.5.62.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | bind | 9.16.50-150400.5.62.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | bind | 9.16.50-150500.8.38.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | bind | 9.16.50-150500.8.38.1 |
| SUSE Linux Enterprise Micro 5.5 | bind | 9.16.50-150500.8.38.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | bind | 9.20.23-150700.3.25.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | bind | 9.16.6-150300.22.59.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | bind | 9.20.23-150700.3.25.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | bind | 9.16.50-150400.5.62.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | bind | 9.16.50-150500.8.38.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | bind | 9.18.49-150600.3.26.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | bind | 9.16.6-150300.22.59.1 |
| SUSE Linux Enterprise Server 16.0 | bind | 9.20.23-160000.1.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | bind | 9.16.50-150400.5.62.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | bind | 9.16.50-150500.8.38.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | bind | 9.18.49-150600.3.26.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | bind | 9.16.6-150300.22.59.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | bind | 9.20.23-160000.1.1 |
| SUSE Manager Client Tools for SLE Micro 5 | bind | 9.16.6-150000.12.91.1 |
| SUSE Multi Linux Manager Tools SLE-Micro-5 | bind | 9.16.6-150000.12.91.1 |
| Ubuntu 20.04 LTS | bind9-libs | no fix |
| Ubuntu 22.04 LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.4 |
| Ubuntu 22.04 LTS | bind9-libs | no fix |
| Ubuntu 24.04 LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.5 |
| Ubuntu 25.10 | bind9 | 1:9.20.11-1ubuntu2.4 |
| Ubuntu 26.04 LTS | bind9 | 1:9.20.18-1ubuntu2.1 |
| Ubuntu Pro 14.04 LTS | bind9 | 1:9.9.5.dfsg-3ubuntu0.19+esm14 |
| Ubuntu Pro 16.04 LTS | bind9 | 1:9.10.3.dfsg.P4-8ubuntu1.19+esm10 |
| Ubuntu Pro 18.04 LTS | bind9 | 1:9.11.3+dfsg-1ubuntu1.19+esm5 |
| Ubuntu Pro 20.04 LTS | bind9 | 1:9.18.30-0ubuntu0.20.04.2+esm2 |
| openSUSE Leap 16.0 | bind | 9.20.23-160000.1.1 |
| openSUSE Tumbleweed | bind | 9.20.23-1.1 |