An issue was discovered in the Linux kernel through 4.19. An information leak in cdrom_ioctl_select_disc in drivers/cdrom/cdrom.c could be used by local attackers to read kernel memory because a cast from unsigned long to int interferes with bounds checking. This is similar to CVE-2018-10940 and CVE-2018-16658.
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e4f3aa2e1e67bb48dfbaaf1cad59013d5a5bc276
www.securityfocus.com/bid/106041
github.com/torvalds/linux/commit/e4f3aa2e1e67bb48dfbaaf1cad59013d5a5bc276
lists.debian.org/debian-lts-announce/2019/03/msg00017.html
lists.debian.org/debian-lts-announce/2019/03/msg00034.html
lists.debian.org/debian-lts-announce/2019/04/msg00004.html
usn.ubuntu.com/3846-1/
usn.ubuntu.com/3847-1/
usn.ubuntu.com/3847-2/
usn.ubuntu.com/3847-3/
usn.ubuntu.com/3848-1/
usn.ubuntu.com/3848-2/
usn.ubuntu.com/3849-1/
usn.ubuntu.com/3849-2/