Downgrading everything which was 2:4.3.11+dfsg-0ubuntu0.16.04.26 to 2:4.3.8+dfsg-0ubuntu1 worked for us. Here is the command we used:
apt-get install samba=2:4.3.8+dfsg-0ubuntu1 samba-common=2:4.3.8+dfsg- 0ubuntu1 samba-common-bin=2:4.3.8+dfsg-0ubuntu1 libwbclient0=2:4.3.8 +dfsg-0ubuntu1 samba-libs=2:4.3.8+dfsg-0ubuntu1 python-samba=2:4.3.8 +dfsg-0ubuntu1 samba-dsdb-modules=2:4.3.8+dfsg-0ubuntu1 winbind=2:4.3.8 +dfsg-0ubuntu1 samba-vfs-modules=2:4.3.8+dfsg-0ubuntu1 libsmbclient=2:4.3.8+dfsg-0ubuntu1 apt-mark hold samba If you have other packages installed, you can list all in need of a downgrade with: apt list | grep 2:4.3.11+dfsg-0ubuntu0.16.04.26 | grep installed Looking forward to a new version of the security fix which does not disable LDAP. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875798 Title: Samba 2:4.3.11+dfsg-0ubuntu0.16.04.26: LDAP request size (81) exceeds (0) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1875798/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs