A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op.
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
https://www.openwall.com/lists/oss-security/2020/10/30/1,
http://www.openwall.com/lists/oss-security/2020/11/04/3
https://bugzilla.redhat.com/show_bug.cgi?id=1893287,
http://www.openwall.com/lists/oss-security/2020/10/30/1
Source: MITRE
Published: 2021-05-26
Updated: 2022-05-13
Type: CWE-362
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
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1
Severity: HIGH