Built a eoan package with xnox's updated patch in my ppa:
https://launchpad.net/~bryanquigley/+archive/ubuntu/1796501/+packages

1. Confirm failure with DNSSEC=yes, DNS server 1.1.1.1
$ resolvectl query people.com.cn
people.com.cn: resolve call failed: DNSSEC validation failed: failed-auxiliary

2. Add PPA and upgrade systemd to PPA version.

3. Confirm success:
resolvectl query people.com.cn
people.com.cn: 106.48.12.140                   -- link: ens2
               106.48.12.141                   -- link: ens2
               (hpcc-download-foreign.chinacache.net)

** Patch added: "eoan debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1796501/+attachment/5288416/+files/systemd_241-7ubuntu2.debdiff

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https://bugs.launchpad.net/bugs/1796501

Title:
  systemd-resolved tries to mitigate DVE-2018-0001 even if DNSSEC=yes

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