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CVE-2026-11622

Fixed in a distro release EPSS <1%CVSS 7.5

A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the `max-cache-size` parameter. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Published 2026-07-22 · CVE record · OSV

Products: ISC BIND 9

Distro releases

ReleasePackageFixed in
AlmaLinux 10bind32:9.18.33-15.el10_2.10
AlmaLinux 10bind-chroot32:9.18.33-15.el10_2.10
AlmaLinux 10bind-devel32:9.18.33-15.el10_2.10
AlmaLinux 10bind-dnssec-utils32:9.18.33-15.el10_2.10
AlmaLinux 10bind-doc32:9.18.33-15.el10_2.10
AlmaLinux 10bind-libs32:9.18.33-15.el10_2.10
AlmaLinux 10bind-license32:9.18.33-15.el10_2.10
AlmaLinux 10bind-utils32:9.18.33-15.el10_2.10
AlmaLinux 8bind32:9.11.36-16.el8_10.14
AlmaLinux 8bind-chroot32:9.11.36-16.el8_10.14
AlmaLinux 8bind-devel32:9.11.36-16.el8_10.14
AlmaLinux 8bind-export-devel32:9.11.36-16.el8_10.14
AlmaLinux 8bind-export-libs32:9.11.36-16.el8_10.14
AlmaLinux 8bind-libs32:9.11.36-16.el8_10.14
AlmaLinux 8bind-libs-lite32:9.11.36-16.el8_10.14
AlmaLinux 8bind-license32:9.11.36-16.el8_10.14
AlmaLinux 8bind-lite-devel32:9.11.36-16.el8_10.14
AlmaLinux 8bind-pkcs1132:9.11.36-16.el8_10.14
AlmaLinux 8bind-pkcs11-devel32:9.11.36-16.el8_10.14
AlmaLinux 8bind-pkcs11-libs32:9.11.36-16.el8_10.14
AlmaLinux 8bind-pkcs11-utils32:9.11.36-16.el8_10.14
AlmaLinux 8bind-sdb32:9.11.36-16.el8_10.14
AlmaLinux 8bind-sdb-chroot32:9.11.36-16.el8_10.14
AlmaLinux 8bind-utils32:9.11.36-16.el8_10.14
AlmaLinux 8bind9.1632:9.16.23-0.22.el8_10.12
AlmaLinux 8bind9.16-chroot32:9.16.23-0.22.el8_10.12
AlmaLinux 8bind9.16-devel32:9.16.23-0.22.el8_10.12
AlmaLinux 8bind9.16-dnssec-utils32:9.16.23-0.22.el8_10.12
AlmaLinux 8bind9.16-doc32:9.16.23-0.22.el8_10.12
AlmaLinux 8bind9.16-libs32:9.16.23-0.22.el8_10.12
AlmaLinux 8bind9.16-license32:9.16.23-0.22.el8_10.12
AlmaLinux 8bind9.16-utils32:9.16.23-0.22.el8_10.12
AlmaLinux 8python3-bind32:9.11.36-16.el8_10.14
AlmaLinux 8python3-bind9.1632:9.16.23-0.22.el8_10.12
AlmaLinux 9bind32:9.16.23-40.el9_8.8
AlmaLinux 9bind-chroot32:9.16.23-40.el9_8.8
AlmaLinux 9bind-devel32:9.16.23-40.el9_8.8
AlmaLinux 9bind-dnssec-doc32:9.16.23-40.el9_8.8
AlmaLinux 9bind-dnssec-utils32:9.16.23-40.el9_8.8
AlmaLinux 9bind-doc32:9.16.23-40.el9_8.8
AlmaLinux 9bind-libs32:9.16.23-40.el9_8.8
AlmaLinux 9bind-license32:9.16.23-40.el9_8.8
AlmaLinux 9bind-utils32:9.16.23-40.el9_8.8
AlmaLinux 9bind9.1832:9.18.29-14.el9_8.8
AlmaLinux 9bind9.18-chroot32:9.18.29-14.el9_8.8
AlmaLinux 9bind9.18-devel32:9.18.29-14.el9_8.8
AlmaLinux 9bind9.18-dnssec-utils32:9.18.29-14.el9_8.8
AlmaLinux 9bind9.18-doc32:9.18.29-14.el9_8.8
AlmaLinux 9bind9.18-libs32:9.18.29-14.el9_8.8
AlmaLinux 9bind9.18-utils32:9.18.29-14.el9_8.8
AlmaLinux 9python3-bind32:9.16.23-40.el9_8.8
Alpine 3.22bind9.20.26-r0
Alpine 3.23bind9.20.26-r0
Alpine 3.24bind9.20.26-r0
Amazon Linux 2bind32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-chroot32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-devel32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-export-devel32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-export-libs32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-libs32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-libs-lite32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-license32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-lite-devel32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-pkcs1132:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-pkcs11-devel32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-pkcs11-libs32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-pkcs11-utils32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-sdb32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-sdb-chroot32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2bind-utils32:9.11.4-26.P2.amzn2.13.17
Amazon Linux 2023bind32:9.18.50-1.amzn2023.0.2
Amazon Linux 2023bind-chroot32:9.18.50-1.amzn2023.0.2
Amazon Linux 2023bind-devel32:9.18.50-1.amzn2023.0.2
Amazon Linux 2023bind-dnssec-utils32:9.18.50-1.amzn2023.0.2
Amazon Linux 2023bind-doc32:9.18.50-1.amzn2023.0.2
Amazon Linux 2023bind-libs32:9.18.50-1.amzn2023.0.2
Amazon Linux 2023bind-license32:9.18.50-1.amzn2023.0.2
Amazon Linux 2023bind-utils32:9.18.50-1.amzn2023.0.2
Debian 12bind91:9.18.49-1~deb12u2
Debian 13bind91:9.20.26-1~deb13u1
Debian 14bind91:9.20.26-1
Red Hat Enterprise Linux 10.2bind32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-chroot32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-debuginfo32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-debugsource32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-devel32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-dnssec-utils32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-dnssec-utils-debuginfo32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-doc32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-libs32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-libs-debuginfo32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-license32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-utils32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 10.2bind-utils-debuginfo32:9.18.33-15.el10_2.10
Red Hat Enterprise Linux 8bind32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-chroot32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-debuginfo32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-debugsource32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-devel32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-export-devel32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-export-libs32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-export-libs-debuginfo32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-libs32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-libs-debuginfo32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-libs-lite32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-libs-lite-debuginfo32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-license32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-lite-devel32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-pkcs1132:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-pkcs11-debuginfo32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-pkcs11-devel32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-pkcs11-libs32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-pkcs11-libs-debuginfo32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-pkcs11-utils32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-pkcs11-utils-debuginfo32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-sdb32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-sdb-chroot32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-sdb-debuginfo32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-utils32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind-utils-debuginfo32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8bind9.1632:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-chroot32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-debuginfo32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-debugsource32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-devel32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-dnssec-utils32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-dnssec-utils-debuginfo32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-doc32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-libs32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-libs-debuginfo32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-license32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-utils32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8bind9.16-utils-debuginfo32:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 8python3-bind32:9.11.36-16.el8_10.14
Red Hat Enterprise Linux 8python3-bind9.1632:9.16.23-0.22.el8_10.12
Red Hat Enterprise Linux 9bind32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-chroot32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-debuginfo32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-debugsource32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-devel32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-dnssec-doc32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-dnssec-utils32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-dnssec-utils-debuginfo32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-doc32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-libs32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-libs-debuginfo32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-license32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-utils32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind-utils-debuginfo32:9.16.23-40.el9_8.8
Red Hat Enterprise Linux 9bind9.1832:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-chroot32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-debuginfo32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-debugsource32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-devel32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-dnssec-utils32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-dnssec-utils-debuginfo32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-doc32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-libs32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-libs-debuginfo32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-utils32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9bind9.18-utils-debuginfo32:9.18.29-14.el9_8.8
Red Hat Enterprise Linux 9python3-bind32:9.16.23-40.el9_8.8
Red Hat hummingbird 1bind0:9.20.26-0.1.hum1
Red Hat hummingbird 1bind-chroot0:9.20.26-0.1.hum1
Red Hat hummingbird 1bind-devel0:9.20.26-0.1.hum1
Red Hat hummingbird 1bind-dnssec-utils0:9.20.26-0.1.hum1
Red Hat hummingbird 1bind-doc0:9.20.26-0.1.hum1
Red Hat hummingbird 1bind-libs0:9.20.26-0.1.hum1
Red Hat hummingbird 1bind-utils0:9.20.26-0.1.hum1
Red Hat rhel aus 8.6bind9.1632:9.16.23-0.7.el8_6.11
Red Hat rhel aus 8.6bind9.16-libs32:9.16.23-0.7.el8_6.11
Red Hat rhel e4s 8.8bind9.1632:9.16.23-0.14.el8_8.9
Red Hat rhel e4s 8.8bind9.16-dnssec-utils32:9.16.23-0.14.el8_8.9
Red Hat rhel e4s 8.8bind9.16-libs32:9.16.23-0.14.el8_8.9
Red Hat rhel e4s 9.4bind32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-chroot32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-debuginfo32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-debugsource32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-dnssec-doc32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-dnssec-utils32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-dnssec-utils-debuginfo32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-libs32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-libs-debuginfo32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-license32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-utils32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4bind-utils-debuginfo32:9.16.23-18.el9_4.12
Red Hat rhel e4s 9.4python3-bind32:9.16.23-18.el9_4.12
Red Hat rhel els 7bind32:9.11.4-26.P2.el7_9.21
Red Hat rhel els 7bind-export-libs32:9.11.4-26.P2.el7_9.21
Red Hat rhel els 7bind-libs-lite32:9.11.4-26.P2.el7_9.21
Red Hat rhel els 7bind-pkcs1132:9.11.4-26.P2.el7_9.21
Red Hat rhel els 7bind-pkcs11-libs32:9.11.4-26.P2.el7_9.21
Red Hat rhel els 7bind-pkcs11-utils32:9.11.4-26.P2.el7_9.21
Red Hat rhel els 7bind-sdb32:9.11.4-26.P2.el7_9.21
Red Hat rhel eus 9.6bind32:9.16.23-31.el9_6.4
Red Hat rhel eus 9.6bind-dnssec-utils32:9.16.23-31.el9_6.4
Red Hat rhel eus 9.6bind-libs32:9.16.23-31.el9_6.4
Red Hat rhel eus 9.6bind-utils32:9.16.23-31.el9_6.4
Red Hat rhel eus long life 8.6bind9.1632:9.16.23-0.7.el8_6.11
Red Hat rhel eus long life 8.6bind9.16-libs32:9.16.23-0.7.el8_6.11
Red Hat rhel tus 8.8bind9.1632:9.16.23-0.14.el8_8.9
Red Hat rhel tus 8.8bind9.16-dnssec-utils32:9.16.23-0.14.el8_8.9
Red Hat rhel tus 8.8bind9.16-libs32:9.16.23-0.14.el8_8.9
Rocky Linux 10bind2:9.18.33-15.el10_2.10
Rocky Linux 8bind2:9.11.36-16.el8_10.14
Rocky Linux 8bind9.162:9.16.23-0.22.el8_10.12
Rocky Linux 9bind2:9.16.23-40.el9_8.8
Rocky Linux 9bind9.182:9.18.29-14.el9_8.8
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOSbind9.16.50-150400.5.65.1
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSSbind9.16.50-150400.5.65.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSbind9.16.50-150500.8.41.1
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSbind9.16.50-150500.8.41.1
SUSE Linux Enterprise Micro 5.5bind9.16.50-150500.8.41.1
SUSE Linux Enterprise Module for Basesystem 15 SP7bind9.16.6-150300.22.62.1
SUSE Linux Enterprise Module for Basesystem 15 SP7bind9.20.26-150700.3.29.1
SUSE Linux Enterprise Module for Server Applications 15 SP7bind9.20.26-150700.3.29.1
SUSE Linux Enterprise Server 12 SP5-LTSSbind9.11.22-3.74.1
SUSE Linux Enterprise Server 15 SP4-LTSSbind9.16.50-150400.5.65.1
SUSE Linux Enterprise Server 15 SP5-LTSSbind9.16.50-150500.8.41.1
SUSE Linux Enterprise Server 15 SP6-LTSSbind9.18.50-150600.3.32.1
SUSE Linux Enterprise Server 15 SP6-LTSSbind9.16.6-150300.22.62.1
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5bind9.11.22-3.74.1
SUSE Linux Enterprise Server for SAP Applications 15 SP4bind9.16.50-150400.5.65.1
SUSE Linux Enterprise Server for SAP Applications 15 SP5bind9.16.50-150500.8.41.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6bind9.18.50-150600.3.32.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6bind9.16.6-150300.22.62.1
SUSE Manager Client Tools for SLE Micro 5bind9.16.6-150000.12.91.1
SUSE Multi Linux Manager Tools SLE-Micro-5bind9.16.6-150000.12.91.1
Ubuntu 18.04 LTSisc-dhcpno fix
Ubuntu 20.04 LTSbind9-libsno fix
Ubuntu 22.04 LTSbind91:9.18.39-0ubuntu0.22.04.5
Ubuntu 22.04 LTSbind91:9.18.39-0ubuntu0.22.04.7
Ubuntu 22.04 LTSbind9-libsno fix
Ubuntu 24.04 LTSbind91:9.18.39-0ubuntu0.24.04.6
Ubuntu 24.04 LTSbind91:9.18.39-0ubuntu0.24.04.8
Ubuntu 24.04 LTSisc-dhcpno fix
Ubuntu 26.04 LTSbind91:9.20.24-1ubuntu0.4
Ubuntu 26.04 LTSbind91:9.20.24-1ubuntu0.2
Ubuntu 26.04 LTSisc-dhcpno fix
Ubuntu Pro 14.04 LTSbind9no fix
Ubuntu Pro 14.04 LTSbind91:9.9.5.dfsg-3ubuntu0.19+esm15
Ubuntu Pro 16.04 LTSbind9no fix
Ubuntu Pro 16.04 LTSbind91:9.10.3.dfsg.P4-8ubuntu1.19+esm11
Ubuntu Pro 18.04 LTSbind9no fix
Ubuntu Pro 18.04 LTSbind91:9.11.3+dfsg-1ubuntu1.19+esm6
Ubuntu Pro 20.04 LTSbind91:9.18.30-0ubuntu0.20.04.2+esm3
openSUSE Leap 16.0bind9.20.26-160000.1.1
openSUSE Tumbleweedbind9.20.26-1.1