как воспроизвести:

$ wget https://repo.drweb.com/drweb/drweb.key
$ rpmkeys --import drweb.key
$ rpm -qa | grep pubkey
gpg-pubkey-10100609-5caf344c
gpg-pubkey-d8752769-5c7e73ac
$ apt-get remove gpg-pubkey
Reading Package Lists... Done
Building Dependency Tree... Done
Selecting gpg-pubkey#10100609-5caf344c@1554986060 for 'gpg-pubkey'
The following packages will be REMOVED:
  gpg-pubkey#10100609-5caf344c@1554986060
0 upgraded, 0 newly installed, 1 removed and 265 not upgraded.
Need to get 0B of archives.
After unpacking 0B of additional disk space will be used.
Do you want to continue? [Y/n] y
Segmentation fault

возможно, правильным решением будет вообще игнорировать (со строрны apt-а) все установленные rpm-ом ключи.

собщение об идентичной ошибке на форуме: https://forum.altlinux.org/index.php?topic=43187.0