The new builds with most recent security patches are here!
I remember that the only vulnerability still opened is the v8 (see the comment in this link --> https://review.lineageos.org/c/LineageOS/android_build/+/313397
Furthermore, i implemented the signature spoofing with the help of @Tomoms
From now, you can find the builds (the new and the old one as rollback) inside this mega dir -> https://mega.nz/folder/JYdyVTIT#dYOKUs5e0vyf6AVjyi_qrA
ps: i tested the rom and the spoofing in my old umts_spyder and they seem working