Description
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.
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 | 1:9.19.21-1 | — |
| Debian 14 | dnsjava | 3.6.2-1 | — |
| Debian 14 | dnsmasq | 2.90-1 | — |
| Debian 14 | knot-resolver | 5.7.1-1 | — |
| Debian 14 | pdns-recursor | 4.9.3-1 | — |
| Debian 14 | systemd | 255.4-1 | — |
| Debian 14 | unbound | 1.19.1-1 | — |
| Debian 13 | bind9 | 1:9.19.21-1 | — |
| Debian 13 | dnsjava | 3.6.2-1 | — |
| Debian 13 | dnsmasq | 2.90-1 | — |
| Debian 13 | knot-resolver | 5.7.1-1 | — |
| Debian 13 | pdns-recursor | 4.9.3-1 | — |
| Debian 13 | systemd | 255.4-1 | — |
| Debian 13 | unbound | 1.19.1-1 | — |
| Debian 12 | bind9 | 1:9.18.24-1 | DSA-5621-1 |
| Debian 12 | dnsjava | No fix yet | — |
| Debian 12 | dnsmasq | 2.90-4~deb12u1 | — |
| Debian 12 | knot-resolver | 5.6.0-1+deb12u1 | DSA-5633-1 |
| Debian 12 | pdns-recursor | 4.8.6-1 | DSA-5626-1 |
| Debian 12 | systemd | 252.23-1~deb12u1 | — |
| Debian 12 | unbound | 1.17.1-2+deb12u2 | DSA-5620-1 |
| Debian 11 | bind9 | 1:9.16.48-1 | DSA-5621-1 |
| Debian 11 | dnsmasq | 2.85-1+deb11u1 | DLA-3974-1 |
| Debian 11 | systemd | 247.3-7+deb11u6 | DLA-3859-1 |
| Debian 11 | unbound | 1.13.1-1+deb11u2 | DSA-5620-1 |
| Debian 10 | bind9 | 1:9.11.5.P4+dfsg-5.1+deb10u11 | DLA-3816-1 |
| Debian 10 | unbound | 1.9.0-2+deb10u4 | DLA-3736-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | isc-dhcp | No fix yet | — |
| Ubuntu 26.04 LTS | unbound | 1.24.2-1ubuntu2.4 | USN-8946-1 |
| Ubuntu 25.10 | isc-dhcp | No fix yet | — |
| Ubuntu 24.04 LTS | isc-dhcp | No fix yet | — |
| Ubuntu 24.04 LTS | unbound | 1.19.1-1ubuntu1 | USN-8946-1 |
| Ubuntu 22.04 LTS | bind9 | 1:9.18.18-0ubuntu0.22.04.2 | USN-6633-1 |
| Ubuntu 22.04 LTS | bind9-libs | No fix yet | — |
| Ubuntu 22.04 LTS | dnsmasq | 2.90-0ubuntu0.22.04.1 | USN-6657-1 |
| Ubuntu 22.04 LTS | unbound | 1.13.1-1ubuntu5.4 | USN-8946-1, USN-6665-1 |
| Ubuntu 20.04 LTS | bind9 | 1:9.16.48-0ubuntu0.20.04.1 | USN-6642-1 |
| Ubuntu 20.04 LTS | bind9-libs +1 | No fix yet | — |
| Ubuntu 20.04 LTS | dnsmasq | 2.90-0ubuntu0.20.04.1 | USN-6657-1 |
| Ubuntu 20.04 LTS | unbound | 1.9.4-2ubuntu1.5 | USN-6665-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | knot-resolver +1 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | pdns-recursor | No fix yet | — |
| Ubuntu Pro 20.04 LTS | unbound | 1.9.4-2ubuntu1.11+esm3 | USN-8946-1 |
| Ubuntu Pro 18.04 LTS | bind9 | 1:9.11.3+dfsg-1ubuntu1.19+esm3 | USN-6723-1 |
| Ubuntu Pro 18.04 LTS | dnsmasq | 2.90-0ubuntu0.18.04.1+esm1 | USN-6657-2 |
| Ubuntu Pro 18.04 LTS | knot-resolver +1 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | unbound | 1.6.7-1ubuntu2.6+esm6 | USN-8946-1 |
| Ubuntu Pro 16.04 LTS | bind9 | 1:9.10.3.dfsg.P4-8ubuntu1.19+esm8 | USN-6723-1 |
| Ubuntu Pro 16.04 LTS | dnsmasq | 2.90-0ubuntu0.16.04.1+esm1 | USN-6657-2 |
| Ubuntu Pro 16.04 LTS | knot-resolver +1 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | unbound | 1.5.8-1ubuntu1.1+esm5 | USN-8946-1 |
| Ubuntu Pro 14.04 LTS | bind9 | 1:9.9.5.dfsg-3ubuntu0.19+esm12 | USN-6723-1 |
| Ubuntu Pro 14.04 LTS | dnsmasq | No fix yet | — |
| Ubuntu Pro 14.04 LTS | unbound | 1.4.22-1ubuntu4.14.04.3+esm5 | USN-8946-1 |
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 9 | dnsmasq +1 | 2.85-14.el9_3.1 | RHSA-2024:1334 |
| RHEL 9 | unbound +3 | 1.16.2-3.el9_3.1 | RHSA-2024:0977 |
| RHEL 8 | bind +16 | 32:9.11.36-11.el8_9.1 | RHSA-2024:3271, RHSA-2024:1782 |
| RHEL 8 | bind9.16 +8 | 32:9.16.23-0.16.el8_9.2 | RHSA-2024:1781 |
| RHEL 8 | dnsmasq +1 | 2.79-31.el8_9.2 | RHSA-2024:1335 |
| RHEL 8 | unbound +3 | 1.16.2-5.el8_9.2 | RHSA-2024:0965 |
| RHEL 7 | bind +15 | 32:9.11.4-26.P2.el7_9.16 | RHSA-2024:3741 |
| RHEL 7 | bind-dyndb-ldap | 11.1-7.el7_9.1 | RHSA-2024:3741 |
| RHEL 7 | dhcp +4 | 12:4.2.5-83.el7_9.2 | RHSA-2024:3741 |
Show 12 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 9.2 EUS | dnsmasq +1 | 2.85-6.el9_2.3 | RHSA-2024:1522 |
| RHEL 9.2 EUS | unbound +3 | 1.16.2-3.el9_2.1 | RHSA-2024:0981 |
| 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 9.0 EUS | dnsmasq +1 | 2.85-3.el9_0.1 | RHSA-2024:1543 |
| RHEL 9.0 EUS | unbound +2 | 1.13.1-13.el9_0.4 | RHSA-2024:1801 |
| RHEL 8.8 EUS | bind +16 | 32:9.11.36-8.el8_8.4 | RHSA-2024:2721 |
| RHEL 8.8 EUS | bind9.16 +8 | 32:9.16.23-0.14.el8_8.4 | RHSA-2024:1648 |
| RHEL 8.8 EUS | dhcp +5 | 12:4.3.6-49.el8_8.1 | RHSA-2024:2721 |
| RHEL 8.8 EUS | dnsmasq +1 | 2.79-26.el8_8.4 | RHSA-2024:1544 |
| RHEL 8.8 EUS | unbound +3 | 1.16.2-5.el8_8.1 | RHSA-2024:0982 |
| RHEL 8.6 EUS | bind +16 | 32:9.11.36-3.el8_6.7 | RHSA-2024:2720 |
| RHEL 8.6 EUS | bind9.16 +8 | 32:9.16.23-0.7.el8_6.5 | RHSA-2024:1647 |
| RHEL 8.6 EUS | dhcp +5 | 12:4.3.6-47.el8_6.2 | RHSA-2024:2720 |
| RHEL 8.6 EUS | dnsmasq +1 | 2.79-21.el8_6.5 | RHSA-2024:1545 |
| RHEL 8.6 EUS | unbound +3 | 1.7.3-17.el8_6.4 | RHSA-2024:1804 |
| RHEL 8.4 TUS | bind +16 | 32:9.11.26-4.el8_4.4 | RHSA-2024:2821 |
| RHEL 8.4 TUS | dhcp +5 | 12:4.3.6-44.el8_4.3 | RHSA-2024:2821 |
| RHEL 8.4 TUS | dnsmasq +1 | 2.79-15.el8_4.2 | RHSA-2024:3877 |
| RHEL 8.4 TUS | unbound +3 | 1.7.3-15.el8_4.1 | RHSA-2024:2587 |
| RHEL 8.4 E4S | bind +16 | 32:9.11.26-4.el8_4.4 | RHSA-2024:2821 |
| RHEL 8.4 E4S | dhcp +5 | 12:4.3.6-44.el8_4.3 | RHSA-2024:2821 |
| RHEL 8.4 E4S | dnsmasq +1 | 2.79-15.el8_4.2 | RHSA-2024:3877 |
| RHEL 8.4 E4S | unbound +3 | 1.7.3-15.el8_4.1 | RHSA-2024:2587 |
| RHEL 8.4 AUS | bind +16 | 32:9.11.26-4.el8_4.4 | RHSA-2024:2821 |
| RHEL 8.4 AUS | dhcp +5 | 12:4.3.6-44.el8_4.3 | RHSA-2024:2821 |
| RHEL 8.4 AUS | dnsmasq +1 | 2.79-15.el8_4.2 | RHSA-2024:3877 |
| RHEL 8.4 AUS | unbound +3 | 1.7.3-15.el8_4.1 | RHSA-2024:2587 |
| RHEL 8.2 TUS | unbound +3 | 1.7.3-12.el8_2.1 | RHSA-2024:2696 |
| RHEL 8.2 E4S | unbound +3 | 1.7.3-12.el8_2.1 | RHSA-2024:2696 |
| RHEL 8.2 AUS | bind +16 | 32:9.11.13-6.el8_2.7 | RHSA-2024:2890 |
| RHEL 8.2 AUS | dhcp +5 | 12:4.3.6-40.el8_2.3 | RHSA-2024:2890 |
| RHEL 8.2 AUS | dnsmasq +1 | 2.79-11.el8_2.3 | RHSA-2024:3929 |
| RHEL 8.2 AUS | unbound +3 | 1.7.3-12.el8_2.1 | RHSA-2024:2696 |
| RHEL 7 ELS | unbound +3 | 1.6.6-5.el7_9.1 | RHSA-2024:11003 |
| RHEL 6 ELS | bind +5 | 32:9.8.2-0.68.rc1.el6_10.14 | RHSA-2025:0039 |
| RHEL 6 ELS | bind-dyndb-ldap | 2.3-8.el6_10.1 | RHSA-2025:0039 |
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 9 | dnsmasq +1 | 2.85-14.el9_3.1 | ALSA-2024:1334 |
| AlmaLinux 9 | unbound +3 | 1.16.2-3.el9_3.1 | ALSA-2024:0977 |
| AlmaLinux 8 | bind +16 | 32:9.11.36-11.el8_9.1 | ALSA-2024:3271, ALSA-2024:1782 |
| AlmaLinux 8 | bind9.16 +8 | 32:9.16.23-0.16.el8_9.2.alma.1 | ALSA-2024:1781 |
| AlmaLinux 8 | dnsmasq +1 | 2.79-31.el8_9.2 | ALSA-2024:1335 |
| AlmaLinux 8 | unbound +3 | 1.16.2-5.el8_9.2 | ALSA-2024:0965 |
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 | bind | 2:9.11.36-11.el8_9.1 | RLSA-2024:3271, RLSA-2024:1782 |
| Rocky Linux 8 | bind9.16 | 2:9.16.23-0.16.el8_9.2 | RLSA-2024:1781 |
| Rocky Linux 8 | dhcp | 2:4.3.6-49.el8_9.1 | RLSA-2024:3271, RLSA-2024:1782 |
| Rocky Linux 8 | dnsmasq | 2.79-31.el8_9.2 | RLSA-2024:1335 |
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 SP6 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLES 15 SP6 | unbound | 1.20.0-150600.23.3.1 | SUSE-SU-2024:1923-1 |
| SLES 15 SP5 | bind | 9.16.48-150500.8.16.1 | SUSE-SU-2024:0574-1 |
| SLES 15 SP5 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLES 15 SP5 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| SLES 15 SP4 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SLES 15 SP4 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLES 15 SP4 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| SLES 15 SP3 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLES 15 SP3 | dnsmasq | 2.90-150100.7.28.1 | SUSE-SU-2025:0130-1 |
| SLES 15 SP3 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| 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 |
| SLES 15 SP2 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
Show 21 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | bind | 9.11.22-3.52.1 | SUSE-SU-2024:1894-1 |
| SLES for SAP 15 SP5 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLES for SAP 15 SP4 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SLES for SAP 15 SP4 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLES for SAP 15 SP4 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| SLES for SAP 15 SP3 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLES for SAP 15 SP3 | dnsmasq | 2.90-150100.7.28.1 | SUSE-SU-2025:0130-1 |
| SLES for SAP 15 SP3 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| 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 |
| SLES for SAP 15 SP2 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| SLES for SAP 12 SP5 | bind | 9.11.22-3.52.1 | SUSE-SU-2024:1894-1 |
| SLE Micro 6.0 | dnsmasq | 2.90-1.1 | SUSE-SU-2025:20118-1 |
| SLE Micro 6.0 | unbound | 1.21.0-1.1 | SUSE-SU-2025:20024-1 |
| SLE Micro 5.5 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLE Micro 5.5 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-2, SUSE-SU-2024:1991-1 |
| SLE Micro 5.4 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLE Micro 5.3 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLE Micro 5.2 | dnsmasq | 2.90-150100.7.28.1 | SUSE-SU-2025:0130-1 |
| SLE Micro 5.1 | dnsmasq | 2.90-150100.7.28.1 | SUSE-SU-2025:0130-1 |
| SLE HPC 15 SP5 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLE HPC 15 SP4 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SLE HPC 15 SP4 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SLE HPC 15 SP4 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| SLE HPC 15 SP3 | bind | 9.16.6-150300.22.44.1 | SUSE-SU-2024:1982-1 |
| SLE HPC 15 SP3 | dnsmasq | 2.90-150100.7.28.1 | SUSE-SU-2025:0130-1 |
| SLE HPC 15 SP3 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| 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 |
| SLE HPC 15 SP2 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| SUSE Package Hub 15 SP5 | pdns-recursor | 4.8.6-bp155.2.3.1 | openSUSE-SU-2024:0048-1 |
| SUSE Manager Server 4.3 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SUSE Manager Server 4.3 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SUSE Manager Server 4.3 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| SUSE Manager Proxy 4.3 | bind | 9.16.48-150400.5.40.1 | SUSE-SU-2024:0590-1 |
| SUSE Manager Proxy 4.3 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| SUSE Manager Proxy 4.3 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
| 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 |
| SUSE Enterprise Storage 7.1 | dnsmasq | 2.90-150100.7.28.1 | SUSE-SU-2025:0130-1 |
| SUSE Enterprise Storage 7.1 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.18.24-1.1 | openSUSE-SU-2024:13687-1 |
| openSUSE Tumbleweed | unbound | 1.19.1-1.1 | openSUSE-SU-2024:13742-1 |
| openSUSE Leap 15.6 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
| openSUSE Leap 15.6 | unbound | 1.20.0-150600.23.3.1 | SUSE-SU-2024:1923-1 |
| openSUSE Leap 15.5 | bind | 9.16.48-150500.8.16.1 | SUSE-SU-2024:0574-1 |
| openSUSE Leap 15.5 | pdns-recursor | 4.8.6-bp155.2.3.1 | openSUSE-SU-2024:0048-1 |
| openSUSE Leap 15.5 | unbound | 1.20.0-150100.10.13.1 | SUSE-SU-2024:1991-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.5 | dnsmasq | 2.90-150400.16.3.1 | SUSE-SU-2025:0071-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.18.24-r0 | — |
| Alpine v3.24 | dnsmasq | 2.90-r0 | — |
| Alpine v3.24 | knot-resolver | 5.7.1-r0 | — |
| Alpine v3.24 | pdns-recursor | 5.0.2-r0 | — |
| Alpine v3.24 | unbound | 1.19.1-r0 | — |
| Alpine v3.23 | bind | 9.18.24-r0 | — |
| Alpine v3.23 | dnsmasq | 2.90-r0 | — |
| Alpine v3.23 | knot-resolver | 5.7.1-r0 | — |
| Alpine v3.23 | pdns-recursor | 5.0.2-r0 | — |
| Alpine v3.23 | unbound | 1.19.1-r0 | — |
| Alpine v3.22 | bind | 9.18.24-r0 | — |
| Alpine v3.22 | dnsmasq | 2.90-r0 | — |
| Alpine v3.22 | knot-resolver | 5.7.1-r0 | — |
| Alpine v3.22 | pdns-recursor | 5.0.2-r0 | — |
| Alpine v3.22 | unbound | 1.19.1-r0 | — |
| Alpine v3.21 | bind | 9.18.24-r0 | — |
| Alpine v3.21 | dnsmasq | 2.90-r0 | — |
| Alpine v3.21 | knot-resolver | 5.7.1-r0 | — |
| Alpine v3.21 | pdns-recursor | 5.0.2-r0 | — |
| Alpine v3.21 | unbound | 1.19.1-r0 | — |
| Alpine v3.20 | bind | 9.18.24-r0 | — |
| Alpine v3.20 | dnsmasq | 2.90-r0 | — |
| Alpine v3.20 | knot-resolver | 5.7.1-r0 | — |
| Alpine v3.20 | pdns-recursor | 5.0.2-r0 | — |
| Alpine v3.20 | unbound | 1.19.1-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 v3.19 | dnsmasq | 2.90-r0 | — |
| Alpine v3.19 | knot-resolver | 5.7.1-r0 | — |
| Alpine v3.19 | pdns-recursor | 4.9.3-r0 | — |
| Alpine v3.19 | unbound | 1.19.1-r0 | — |
| Alpine v3.18 | bind | 9.18.24-r0 | — |
| Alpine v3.18 | dnsmasq | 2.90-r0 | — |
| Alpine v3.18 | knot-resolver | 5.7.1-r0 | — |
| Alpine v3.18 | pdns-recursor | 4.9.3-r0 | — |
| Alpine v3.18 | unbound | 1.19.1-r0 | — |
| Alpine v3.17 | bind | 9.18.24-r0 | — |
| Alpine v3.17 | dnsmasq | 2.90-r0 | — |
| Alpine v3.17 | unbound | 1.19.1-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 |
| Amazon Linux 2023 | dnsmasq +1 | 2.90-1.amzn2023.0.1 | ALAS2023-2024-552 |
| Amazon Linux 2023 | unbound +5 | 1.17.1-1.amzn2023.0.2 | ALAS2023-2024-553 |
| Amazon Linux 2 | bind +15 | 32:9.11.4-26.P2.amzn2.13.6 | ALAS2-2024-2530 |
| Amazon Linux 2 | unbound +4 | 1.7.3-15.amzn2.0.7 | ALAS2-2024-2481 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | unbound | 1.19.1-1 | — |
| Azure Linux 2 (CBL-Mariner) | unbound | 1.19.1-1 | — |
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 9 | dnsmasq +1 | 2.85-14.el9_3.1 | ELSA-2024-1334 |
| Oracle Linux 9 | unbound +3 | 1.16.2-3.el9_3.1 | ELSA-2024-0977 |
| Oracle Linux 8 | bind +16 | 32:9.11.36-11.el8_9.1 | ELSA-2024-3271, ELSA-2024-1782 |
| Oracle Linux 8 | bind9.16 +8 | 32:9.16.23-0.16.el8_9.2 | ELSA-2024-1781 |
| Oracle Linux 8 | dhcp-libs +4 | 12:4.3.6-49.el8_9.1 | ELSA-2024-3271, ELSA-2024-1782 |
| Oracle Linux 8 | dnsmasq +1 | 2.79-31.el8_9.2 | ELSA-2024-1335 |
| Oracle Linux 8 | unbound +3 | 1.16.2-5.el8_9.2 | ELSA-2024-0965 |
| Oracle Linux 7 | bind +15 | 32:9.11.4-26.P2.el7_9.16 | ELSA-2024-3741 |
| Oracle Linux 7 | bind-dyndb-ldap | 11.1-7.el7_9.1 | ELSA-2024-3741 |
| Oracle Linux 7 | dhcp +4 | 12:4.2.5-83.0.3.el7_9.2 | ELSA-2024-3741 |
| Oracle Linux 7 | unbound +3 | 1.6.6-5.0.1.el7_8 | ELSA-2024-11003 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | bind | 9.18.24-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
Goethe-Universitat-Cybersecurity/NSEC3-Encloser-Attack ★ 6 · Mar 19, 2024
This project generates DNS zonefiles with custom NSEC3 parameters to reproduce and evaluate the attacks in CVE-2023-50868.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 50
- ALSA-2024:1334 Important: dnsmasq security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:2551 Important: bind security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0977 Important: unbound 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
- ALSA-2024:1782 Important: bind and dhcp security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0965 Important: unbound security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:1335 Important: dnsmasq security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:3271 Important: bind and dhcp 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
- USN-8946-1 unbound vulnerabilities Ubuntu Security Notices (USN) · Oct 21, 2026
- RHSA-2025:0039 Red Hat Security Advisory: bind and bind-dyndb-ldap security update Red Hat Security Advisories (RHSA) · Sep 20, 2026
- RHSA-2024:2720 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- WID-SEC-2025-0148 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- RHSA-2024:3741 Red Hat Security Advisory: bind, bind-dyndb-ldap, and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:3271 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2890 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2821 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2721 Red Hat Security Advisory: bind and dhcp security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2696 Red Hat Security Advisory: unbound security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2587 Red Hat Security Advisory: unbound security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:2551 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2024:1804 Red Hat Security Advisory: unbound 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-2024:1801 Red Hat Security Advisory: unbound security update 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-2024:1782 Red Hat Security Advisory: bind and dhcp 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
- RHSA-2024:1648 Red Hat Security Advisory: bind9.16 security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- USN-6723-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- RHSA-2024:11003 Red Hat Security Advisory: unbound security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:0977 Red Hat Security Advisory: unbound security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:0981 Red Hat Security Advisory: unbound security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6657-2 dnsmasq vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- WID-SEC-2024-1226 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- RHSA-2024:1545 Red Hat Security Advisory: dnsmasq security update Red Hat Security Advisories (RHSA) · May 1, 2026
- RHSA-2024:1544 Red Hat Security Advisory: dnsmasq security and bug fix update Red Hat Security Advisories (RHSA) · May 1, 2026
- USN-6642-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-6633-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-6657-1 dnsmasq vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-6665-1 unbound vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- RHSA-2024:3929 Red Hat Security Advisory: dnsmasq security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:3877 Red Hat Security Advisory: dnsmasq security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:1543 Red Hat Security Advisory: dnsmasq security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:1522 Red Hat Security Advisory: dnsmasq security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:1335 Red Hat Security Advisory: dnsmasq security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:1334 Red Hat Security Advisory: dnsmasq security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:0982 Red Hat Security Advisory: unbound security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
References
- https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html
- https://www.isc.org/blogs/2024-bind-security-release/
- https://datatracker.ietf.org/doc/html/rfc5155
- https://kb.isc.org/docs/cve-2023-50868
- https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html
- https://access.redhat.com/security/cve/CVE-2023-50868
- https://bugzilla.suse.com/show_bug.cgi?id=1219826
- [oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities mailing-list
- [oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities mailing-list
- FEDORA-2024-2e26eccfcb vendor-advisory
- FEDORA-2024-e24211eff0 vendor-advisory
- FEDORA-2024-21310568fa vendor-advisory
- [debian-lts-announce] 20240221 [SECURITY] [DLA 3736-1] unbound security update mailing-list
- FEDORA-2024-b0f9656a76 vendor-advisory
- FEDORA-2024-4e36df9dfd vendor-advisory
- FEDORA-2024-499b9be35f vendor-advisory
- FEDORA-2024-c36c448396 vendor-advisory
- FEDORA-2024-c967c7d287 vendor-advisory
- FEDORA-2024-e00eceb11c vendor-advisory
- FEDORA-2024-fae88b73eb vendor-advisory
- https://security.netapp.com/advisory/ntap-20240307-0008/
- [debian-lts-announce] 20240517 [SECURITY] [DLA 3816-1] bind9 security update mailing-list