diff -up gnupg-2.2.23/g10/keygen.c.large-rsa gnupg-2.2.23/g10/keygen.c

--- gnupg-2.2.23/g10/keygen.c.large-rsa	2020-09-04 13:53:42.030486671 +0200

+++ gnupg-2.2.23/g10/keygen.c	2020-09-04 13:55:52.896669542 +0200

@@ -2262,7 +2262,7 @@ get_keysize_range (int algo, unsigned in

     default:

       *min = opt.compliance == CO_DE_VS ? 2048: 1024;

-      *max = 4096;

+      *max = opt.flags.large_rsa == 1 ? 8192 : 4096;

       def = 3072;

       break;

     }