Seems like Disco and late already have the requested fix.
$ git describe --contains 3740146a4cbd99883af79e375ee4836206dcea4e
v240
$ rmadison systemd
systemd | 204-5ubuntu20 | trusty | source
systemd | 204-5ubuntu20.31 | trusty-security | source, amd64, arm64, armhf,
i386, powerpc, ppc64el
systemd | 204-5ubuntu20.31 | trusty-updates | source, amd64, arm64, armhf,
i386, powerpc, ppc64el
systemd | 229-4ubuntu4 | xenial | source, amd64, arm64, armhf,
i386, powerpc, ppc64el, s390x
systemd | 229-4ubuntu21.21 | xenial-security | source, amd64, arm64, armhf,
i386, powerpc, ppc64el, s390x
systemd | 229-4ubuntu21.23 | xenial-updates | source, amd64, arm64, armhf,
i386, powerpc, ppc64el, s390x
systemd | 237-3ubuntu10 | bionic | source, amd64, arm64, armhf,
i386, ppc64el, s390x
systemd | 237-3ubuntu10.29 | bionic-security | source, amd64, arm64, armhf,
i386, ppc64el, s390x
systemd | 237-3ubuntu10.33 | bionic-updates | source, amd64, arm64, armhf,
i386, ppc64el, s390x
# Not affected:
systemd | 240-6ubuntu5 | disco | source, amd64, arm64, armhf,
i386, ppc64el, s390x
systemd | 240-6ubuntu5.7 | disco-security | source, amd64, arm64, armhf,
i386, ppc64el, s390x
systemd | 240-6ubuntu5.8 | disco-updates | source, amd64, arm64, armhf,
i386, ppc64el, s390x
systemd | 242-7ubuntu3 | eoan | source, amd64, arm64, armhf,
i386, ppc64el, s390x
systemd | 242-7ubuntu3.2 | eoan-updates | source, amd64, arm64, armhf,
i386, ppc64el, s390x
systemd | 244-3ubuntu1 | focal | source, amd64, arm64, armhf,
i386, ppc64el, s390x
systemd | 244-3ubuntu5 | focal-proposed | source, amd64, arm64, armhf,
i386, ppc64el, s390x
** Changed in: systemd (Ubuntu Focal)
Status: Confirmed => Fix Released
** Changed in: systemd (Ubuntu Eoan)
Status: New => Fix Released
** Changed in: systemd (Ubuntu Disco)
Status: New => Fix Released
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Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1822416
Title:
resolve: do not hit CNAME or DNAME entry in NODATA cache
Status in systemd package in Ubuntu:
Fix Released
Status in systemd source package in Bionic:
Confirmed
Status in systemd source package in Disco:
Fix Released
Status in systemd source package in Eoan:
Fix Released
Status in systemd source package in Focal:
Fix Released
Bug description:
The question: DNS A record lookups fail to resolve due to cached CNAME
NODATA lookups ...
https://askubuntu.com/questions/1063462/18-04-server-systemd-resolve-
returns-cached-cname-nodata-for-a-lookup
Upstream at Github: Systemd issue 998 - Cached cname NODATA returned
for A lookup ...
https://github.com/systemd/systemd/issues/9833
Please patch ...
https://github.com/systemd/systemd/commit/3740146a4cbd99883af79e375ee4836206dcea4e
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1822416/+subscriptions
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