Thanks for reporting this - FYI you can see the status of each CVE via
the CVE tracker http://people.canonical.com/~ubuntu-security/cve/

ie.

https://people.canonical.com/~ubuntu-
security/cve/2017/CVE-2017-7526.html

This CVE was triaged against libgrypt only - not against gnupg1 - and
all the upstream CVE trackers only seem to reference this CVE against
libgcrypt. I can see the mention of CVE-2017-7526 on their homepage for
GnuPG 1.4.23, however looking at the changes for 1.4.23 I can see no
commits that appear relevant to this CVE: https://git.gnupg.org/cgi-
bin/gitweb.cgi?p=gnupg.git;a=shortlog;h=refs/heads/STABLE-BRANCH-1-4

However, if we look at the changes that went into 1.4.22 then there are
a bunch of changes which look analogous to the ones for libgrypt for
CVE-2017-7526:

https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=b38f4489f75e6e435886aa885807738a22c7ff60
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=12029f83fd0ab3e8ad524f6c9135854662fddfd1
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=554ded4854758bf6ca268432fa087f946932a409
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=8fd9f72e1b2e578e45c98c978cab4f6d47683d2c

Also I can't see any release annoucements for 1.4.22 or 1.4.23 in gnupg-
announce either which is unfortunate.

I will retriage this against gnupg1 as well and this will be fixed soon.

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https://bugs.launchpad.net/bugs/1785176

Title:
  GnuPG 1.4.23 released on 2018-06-11, addresses CVE-2017-7526

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