The rbd block device driver in drivers/block/rbd.c in the Linux kernel through 5.8.9 used incomplete permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap rbd block devices, aka CID-f44d04e696fe.
https://twitter.com/grsecurity/status/1304537507560919041
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
Source: MITRE
Published: 2020-09-13
Updated: 2022-04-28
Type: CWE-863
Base Score: 1.9
Vector: AV:L/AC:M/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 3.4
Severity: LOW
Base Score: 4.1
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 0.5
Severity: MEDIUM