openbsd 8.0 · errata 011
Fix out of bounds reads and writes as well as info leaks in zlib.
installera
# syspatch
källpatch
signify -Vep /etc/signify/openbsd-80-base.pub -x 011_zlib.patch.sig \
-m - | (cd /usr/src && patch -p0)
And then rebuild and install libz:
cd /usr/src/lib/libz
make obj
make
make install