CVE-2026-19630
Fixed in a distro release EPSS <1%CVSS 7.5
In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.
Products: ISC BIND 9
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.22 | bind | 9.20.30-r0 |
| Alpine 3.23 | bind | 9.20.30-r0 |
| Alpine 3.24 | bind | 9.20.30-r0 |
| Debian 12 | bind9 | no fix |
| Debian 13 | bind9 | 1:9.20.30-1~deb13u1 |
| Debian 14 | bind9 | 1:9.20.30-1 |
| Ubuntu 18.04 LTS | isc-dhcp | no fix |
| Ubuntu 20.04 LTS | bind9-libs | no fix |
| Ubuntu 22.04 LTS | bind9 | no fix |
| Ubuntu 22.04 LTS | bind9-libs | no fix |
| Ubuntu 24.04 LTS | bind9 | no fix |
| Ubuntu 24.04 LTS | isc-dhcp | no fix |
| Ubuntu 26.04 LTS | bind9 | no fix |
| Ubuntu 26.04 LTS | isc-dhcp | no fix |
| Ubuntu 26.10 | bind9 | no fix |
| Ubuntu Pro 14.04 LTS | bind9 | no fix |
| Ubuntu Pro 16.04 LTS | bind9 | no fix |
| Ubuntu Pro 18.04 LTS | bind9 | no fix |
| Ubuntu Pro 20.04 LTS | bind9 | no fix |
| openSUSE Tumbleweed | bind | 9.20.30-1.1 |