CVE-2026-41292
Fixed in a distro release EPSS <1%CVSS 6.6
NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).
Products: NLnet Labs unbound, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4.22, Red Hat Hardened Images, Red Hat Data Grid 8, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | python3-unbound | 1.24.2-7.el10_2.2 |
| AlmaLinux 10 | unbound | 1.24.2-7.el10_2.2 |
| AlmaLinux 10 | unbound-anchor | 1.24.2-7.el10_2.2 |
| AlmaLinux 10 | unbound-devel | 1.24.2-7.el10_2.2 |
| AlmaLinux 10 | unbound-dracut | 1.24.2-7.el10_2.2 |
| AlmaLinux 10 | unbound-libs | 1.24.2-7.el10_2.2 |
| AlmaLinux 10 | unbound-utils | 1.24.2-7.el10_2.2 |
| AlmaLinux 8 | python3-unbound | 1.16.2-5.12.el8_10 |
| AlmaLinux 8 | unbound | 1.16.2-5.12.el8_10 |
| AlmaLinux 8 | unbound-devel | 1.16.2-5.12.el8_10 |
| AlmaLinux 8 | unbound-libs | 1.16.2-5.12.el8_10 |
| AlmaLinux 9 | python3-unbound | 1.24.2-3.el9_8.2 |
| AlmaLinux 9 | unbound | 1.24.2-3.el9_8.2 |
| AlmaLinux 9 | unbound-devel | 1.24.2-3.el9_8.2 |
| AlmaLinux 9 | unbound-dracut | 1.24.2-3.el9_8.2 |
| AlmaLinux 9 | unbound-libs | 1.24.2-3.el9_8.2 |
| Alpine 3.22 | unbound | 1.25.2-r0 |
| Alpine 3.23 | unbound | 1.25.2-r0 |
| Alpine 3.24 | unbound | 1.25.1-r0 |
| Debian 12 | unbound | no fix |
| Debian 13 | unbound | 1.22.0-2+deb13u3 |
| Debian 14 | unbound | 1.25.1-1 |
| Red Hat Enterprise Linux 10.2 | python3-unbound | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | python3-unbound-debuginfo | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-anchor | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-anchor-debuginfo | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-debuginfo | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-debugsource | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-devel | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-dracut | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-libs | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-libs-debuginfo | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-utils | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | unbound-utils-debuginfo | 0:1.24.2-7.el10_2.2 |
| Red Hat Enterprise Linux 8 | python3-unbound | 0:1.16.2-5.12.el8_10 |
| Red Hat Enterprise Linux 8 | python3-unbound-debuginfo | 0:1.16.2-5.12.el8_10 |
| Red Hat Enterprise Linux 8 | unbound | 0:1.16.2-5.12.el8_10 |
| Red Hat Enterprise Linux 8 | unbound-debuginfo | 0:1.16.2-5.12.el8_10 |
| Red Hat Enterprise Linux 8 | unbound-debugsource | 0:1.16.2-5.12.el8_10 |
| Red Hat Enterprise Linux 8 | unbound-devel | 0:1.16.2-5.12.el8_10 |
| Red Hat Enterprise Linux 8 | unbound-libs | 0:1.16.2-5.12.el8_10 |
| Red Hat Enterprise Linux 8 | unbound-libs-debuginfo | 0:1.16.2-5.12.el8_10 |
| Red Hat Enterprise Linux 9 | python3-unbound | 0:1.24.2-3.el9_8.2 |
| Red Hat Enterprise Linux 9 | python3-unbound-debuginfo | 0:1.24.2-3.el9_8.2 |
| Red Hat Enterprise Linux 9 | unbound | 0:1.24.2-3.el9_8.2 |
| Red Hat Enterprise Linux 9 | unbound-debuginfo | 0:1.24.2-3.el9_8.2 |
| Red Hat Enterprise Linux 9 | unbound-debugsource | 0:1.24.2-3.el9_8.2 |
| Red Hat Enterprise Linux 9 | unbound-devel | 0:1.24.2-3.el9_8.2 |
| Red Hat Enterprise Linux 9 | unbound-dracut | 0:1.24.2-3.el9_8.2 |
| Red Hat Enterprise Linux 9 | unbound-libs | 0:1.24.2-3.el9_8.2 |
| Red Hat Enterprise Linux 9 | unbound-libs-debuginfo | 0:1.24.2-3.el9_8.2 |
| Red Hat hummingbird 1 | python3-unbound | 0:1.25.1-2.hum1 |
| Red Hat hummingbird 1 | unbound | 0:1.25.1-2.hum1 |
| Red Hat hummingbird 1 | unbound-anchor | 0:1.25.1-2.hum1 |
| Red Hat hummingbird 1 | unbound-devel | 0:1.25.1-2.hum1 |
| Red Hat hummingbird 1 | unbound-dracut | 0:1.25.1-2.hum1 |
| Red Hat hummingbird 1 | unbound-libs | 0:1.25.1-2.hum1 |
| Red Hat hummingbird 1 | unbound-munin | 0:1.25.1-2.hum1 |
| Red Hat hummingbird 1 | unbound-utils | 0:1.25.1-2.hum1 |
| Rocky Linux 10 | unbound | 0:1.24.2-7.el10_2.2 |
| Rocky Linux 8 | unbound | 0:1.16.2-5.12.el8_10 |
| Rocky Linux 9 | unbound | 0:1.24.2-3.el9_8.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | unbound | 1.20.0-150100.10.25.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | unbound | 1.20.0-150100.10.25.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | unbound | 1.20.0-150100.10.25.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | unbound | 1.20.0-150100.10.25.1 |
| SUSE Linux Enterprise Micro 5.5 | unbound | 1.20.0-150100.10.25.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | unbound | 1.20.0-150100.10.25.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | unbound | 1.20.0-150100.10.25.1 |
| SUSE Linux Enterprise Server 16.0 | unbound | 1.24.1-160000.2.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | unbound | 1.20.0-150100.10.25.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | unbound | 1.20.0-150100.10.25.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | unbound | 1.24.1-160000.2.1 |
| SUSE Linux Micro 6.2 | unbound | 1.24.1-160000.2.1 |
| Ubuntu 22.04 LTS | unbound | 1.13.1-1ubuntu5.15 |
| Ubuntu 24.04 LTS | unbound | 1.19.2-1ubuntu3.8 |
| Ubuntu 25.10 | unbound | 1.22.0-2ubuntu2.3 |
| Ubuntu 26.04 LTS | unbound | 1.24.2-1ubuntu2.1 |
| Ubuntu Pro 14.04 LTS | unbound | 1.4.22-1ubuntu4.14.04.3+esm3 |
| Ubuntu Pro 16.04 LTS | unbound | 1.5.8-1ubuntu1.1+esm3 |
| Ubuntu Pro 18.04 LTS | unbound | 1.6.7-1ubuntu2.6+esm4 |
| Ubuntu Pro 20.04 LTS | unbound | 1.9.4-2ubuntu1.11+esm1 |
| openSUSE Leap 16.0 | unbound | 1.24.1-160000.2.1 |
| openSUSE Tumbleweed | unbound | 1.25.1-1.1 |