openbsd 7.9 · errata 039
Multiple bugs in video(4) could lead to use-after-free and kernel memory corruption.
installera
# syspatch
källpatch
signify -Vep /etc/signify/openbsd-79-base.pub -x 039_video.patch.sig \
-m - | (cd /usr/src && patch -p0)
And then rebuild and install a new kernel:
KK=`sysctl -n kern.osversion | cut -d# -f1`
cd /usr/src/sys/arch/`machine`/compile/$KK
make obj
make config
make
make install