The vgacon subsystem in the Linux kernel before 5.8.10 mishandles software scrollback. There is a vgacon_scrolldelta out-of-bounds read, aka CID-973c096f6a85.
https://github.com/torvalds/linux/commit/973c096f6a85e5b5f2a295126ba6928d9a6afd45
https://seclists.org/oss-sec/2020/q3/176
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.10
Source: MITRE
Published: 2021-06-24
Updated: 2022-04-06
Type: CWE-125
Base Score: 3.6
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:P
Impact Score: 4.9
Exploitability Score: 3.9
Severity: LOW
Base Score: 5.9
Vector: CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Impact Score: 5.2
Exploitability Score: 0.7
Severity: MEDIUM