CVE-2026-3104
Fixed in a distro release EPSS <1%CVSS 7.5
A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.
Products: ISC BIND 9, Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.22 | bind | 9.20.21-r0 |
| Alpine 3.23 | bind | 9.20.21-r0 |
| Alpine 3.24 | bind | 9.20.21-r0 |
| Debian 13 | bind9 | 1:9.20.21-1~deb13u1 |
| Debian 14 | bind9 | 1:9.20.21-1 |
| Red Hat hummingbird 1 | bind | 0:9.18.48-1.hum1 |
| Red Hat hummingbird 1 | bind-chroot | 0:9.18.48-1.hum1 |
| Red Hat hummingbird 1 | bind-devel | 0:9.18.48-1.hum1 |
| Red Hat hummingbird 1 | bind-dnssec-utils | 0:9.18.48-1.hum1 |
| Red Hat hummingbird 1 | bind-doc | 0:9.18.48-1.hum1 |
| Red Hat hummingbird 1 | bind-libs | 0:9.18.48-1.hum1 |
| Red Hat hummingbird 1 | bind-utils | 0:9.18.48-1.hum1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | bind | 9.20.21-150700.3.18.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | bind | 9.20.21-150700.3.18.1 |
| SUSE Linux Enterprise Server 16.0 | bind | 9.20.21-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | bind | 9.20.21-160000.1.1 |
| Ubuntu 18.04 LTS | isc-dhcp | no fix |
| Ubuntu 20.04 LTS | bind9-libs | no fix |
| Ubuntu 22.04 LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.3 |
| Ubuntu 22.04 LTS | bind9-libs | no fix |
| Ubuntu 24.04 LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.3 |
| Ubuntu 24.04 LTS | isc-dhcp | no fix |
| Ubuntu 25.10 | bind9 | 1:9.20.11-1ubuntu2.2 |
| Ubuntu 25.10 | isc-dhcp | no fix |
| Ubuntu 26.04 LTS | isc-dhcp | no fix |
| openSUSE Leap 16.0 | bind | 9.20.21-160000.1.1 |
| openSUSE Tumbleweed | bind | 9.20.21-1.1 |