All currently supported releases are on bind 9.11 or newer, which as I understand from this bug report should have the fix by default.
bind9 | 1:9.11.3+dfsg-1ubuntu1 | bionic | source, amd64, arm64, armhf, i386, ppc64el, s390x bind9 | 1:9.11.3+dfsg-1ubuntu1.15 | bionic-security | source, amd64, arm64, armhf, i386, ppc64el, s390x bind9 | 1:9.11.3+dfsg-1ubuntu1.15 | bionic-updates | source, amd64, arm64, armhf, i386, ppc64el, s390x bind9 | 1:9.16.1-0ubuntu2 | focal | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x bind9 | 1:9.16.1-0ubuntu2.8 | focal-security | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x bind9 | 1:9.16.1-0ubuntu2.8 | focal-updates | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x bind9 | 1:9.16.8-1ubuntu3 | hirsute | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x bind9 | 1:9.16.8-1ubuntu3.1 | hirsute-security | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x bind9 | 1:9.16.8-1ubuntu3.1 | hirsute-updates | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x bind9 | 1:9.16.15-1ubuntu1 | impish | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
All currently supported releases are on bind 9.11 or newer, which as I understand from this bug report should have the fix by default.
bind9 | 1:9.11. 3+dfsg- 1ubuntu1 | bionic | source, amd64, arm64, armhf, i386, ppc64el, s390x 3+dfsg- 1ubuntu1. 15 | bionic-security | source, amd64, arm64, armhf, i386, ppc64el, s390x 3+dfsg- 1ubuntu1. 15 | bionic-updates | source, amd64, arm64, armhf, i386, ppc64el, s390x
bind9 | 1:9.11.
bind9 | 1:9.11.
bind9 | 1:9.16.1-0ubuntu2 | focal | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
bind9 | 1:9.16.1-0ubuntu2.8 | focal-security | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
bind9 | 1:9.16.1-0ubuntu2.8 | focal-updates | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
bind9 | 1:9.16.8-1ubuntu3 | hirsute | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
bind9 | 1:9.16.8-1ubuntu3.1 | hirsute-security | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
bind9 | 1:9.16.8-1ubuntu3.1 | hirsute-updates | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
bind9 | 1:9.16.15-1ubuntu1 | impish | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x