** DISPUTED ** In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously created with a call to another debugfs function such as debugfs_create_file). NOTE: Linux kernel developers dispute this issue as not being an issue with debugfs, instead this is an issue with misuse of debugfs within blktrace.
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html
https://bugzilla.kernel.org/show_bug.cgi?id=205713
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
Source: MITRE
Published: 2019-12-12
Updated: 2020-12-11
Type: CWE-416
Base Score: 6.4
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P
Impact Score: 4.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 8.2
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Impact Score: 4.2
Exploitability Score: 3.9
Severity: HIGH