The Linux Kernel version 3.18 contains a dangerous feature vulnerability in modify_user_hw_breakpoint() that can result in crash and possibly memory corruption. This attack appear to be exploitable via local code execution and the ability to use ptrace. This vulnerability appears to have been fixed in git commit f67b15037a7a50c57f72e69a6d59941ad90a0f0f.
https://www.debian.org/security/2018/dsa-4188
https://www.debian.org/security/2018/dsa-4187
https://usn.ubuntu.com/3641-2/
https://usn.ubuntu.com/3641-1/
https://lkml.org/lkml/2018/4/6/813
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
https://access.redhat.com/errata/RHSA-2018:1374
https://access.redhat.com/errata/RHSA-2018:1355
https://access.redhat.com/errata/RHSA-2018:1354
https://access.redhat.com/errata/RHSA-2018:1348
https://access.redhat.com/errata/RHSA-2018:1347
https://access.redhat.com/errata/RHSA-2018:1345
https://access.redhat.com/errata/RHSA-2018:1318
http://www.securitytracker.com/id/1040806
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html