CVE-2026-77119
Fixed in a distro release EPSS <1%CVSS 5.9
A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a secure delegation and letting a forged unsigned answer through. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
Products: ISC BIND 9
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.22 | bind | 9.20.29-r0 |
| Alpine 3.23 | bind | 9.20.29-r0 |
| Alpine 3.24 | bind | 9.20.29-r0 |
| Debian 12 | bind9 | no fix |
| Debian 13 | bind9 | 1:9.20.29-1~deb13u1 |
| Debian 14 | bind9 | 1:9.20.29-1 |
| Red Hat hummingbird 1 | bind | 0:9.20.29-0.1.hum1 |
| Red Hat hummingbird 1 | bind-chroot | 0:9.20.29-0.1.hum1 |
| Red Hat hummingbird 1 | bind-devel | 0:9.20.29-0.1.hum1 |
| Red Hat hummingbird 1 | bind-dnssec-utils | 0:9.20.29-0.1.hum1 |
| Red Hat hummingbird 1 | bind-doc | 0:9.20.29-0.1.hum1 |
| Red Hat hummingbird 1 | bind-libs | 0:9.20.29-0.1.hum1 |
| Red Hat hummingbird 1 | bind-utils | 0:9.20.29-0.1.hum1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | bind | 9.16.50-150400.5.70.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | bind | 9.16.50-150400.5.70.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | bind | 9.16.50-150500.8.46.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | bind | 9.16.50-150500.8.46.1 |
| SUSE Linux Enterprise Micro 5.5 | bind | 9.16.50-150500.8.46.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | bind | 9.20.29-150700.3.32.2 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | bind | 9.20.29-150700.3.32.2 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | bind | 9.16.50-150400.5.70.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | bind | 9.16.50-150500.8.46.1 |
| SUSE Linux Enterprise Server 16.0 | bind | 9.20.29-160000.1.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | bind | 9.16.50-150400.5.70.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | bind | 9.16.50-150500.8.46.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | bind | 9.20.29-160000.1.1 |
| Ubuntu 18.04 LTS | isc-dhcp | no fix |
| Ubuntu 20.04 LTS | bind9-libs | no fix |
| Ubuntu 22.04 LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.7 |
| Ubuntu 22.04 LTS | bind9-libs | no fix |
| Ubuntu 24.04 LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.8 |
| Ubuntu 24.04 LTS | isc-dhcp | no fix |
| Ubuntu 26.04 LTS | bind9 | 1:9.20.24-1ubuntu0.4 |
| Ubuntu 26.04 LTS | isc-dhcp | no fix |
| Ubuntu 26.10 | bind9 | no fix |
| Ubuntu Pro 14.04 LTS | bind9 | 1:9.9.5.dfsg-3ubuntu0.19+esm15 |
| Ubuntu Pro 16.04 LTS | bind9 | 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11 |
| Ubuntu Pro 18.04 LTS | bind9 | 1:9.11.3+dfsg-1ubuntu1.19+esm6 |
| Ubuntu Pro 20.04 LTS | bind9 | 1:9.18.30-0ubuntu0.20.04.2+esm3 |
| openSUSE Leap 16.0 | bind | 9.20.29-160000.1.1 |
| openSUSE Tumbleweed | bind | 9.20.29-1.1 |