A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system.
https://bugzilla.redhat.com/show_bug.cgi?id=1842525
https://www.openwall.com/lists/oss-security/2020/06/04/4
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
https://www.debian.org/security/2020/dsa-4699
https://www.debian.org/security/2020/dsa-4698
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
https://security.netapp.com/advisory/ntap-20200702-0004/
https://usn.ubuntu.com/4439-1/
https://usn.ubuntu.com/4426-1/
Source: MITRE
Published: 2020-06-09
Updated: 2022-04-27
Type: CWE-119
Base Score: 6.9
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 3.4
Severity: MEDIUM
Base Score: 7.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1.8
Severity: HIGH