CVE-2018-18653

Name	CVE-2018-18653
Description	The Linux kernel, as used in Ubuntu 18.10 and when booted with UEFI Secure Boot enabled, allows privileged local users to bypass intended Secure Boot restrictions and execute untrusted code by loading arbitrary kernel modules. This occurs because a modified kernel/module.c, in conjunction with certain configuration options, leads to mishandling of the result of signature verification.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	high (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	jessie	3.16.56-1+deb8u1	undetermined
	jessie (security)	3.16.74-1	undetermined
	stretch	4.9.189-3	undetermined
	stretch (security)	4.9.189-3+deb9u1	undetermined
	buster	4.19.67-2	undetermined
	buster (security)	4.19.67-2+deb10u1	undetermined
	bullseye, sid	5.2.17-1	undetermined

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
linux	source	(unstable)	undetermined	high

Notes

check, this should be very Ubuntu specific, but it is introduced with the out-of-tree patch from the Lockdown patchset  https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/cosmic/commit/?id=03c7de9e956395f3b36f86f89b62780ad9501eef and so possibly affect our kernel as well in some way.