A flaw was found in the Linux kernel in versions before 5.9-rc6. When changing screen size, an out-of-bounds memory write can occur leading to memory corruption or a denial of service. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
https://bugzilla.redhat.com/show_bug.cgi?id=1876788
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
Source: MITRE
Published: 2020-09-18
Updated: 2020-11-02
Type: CWE-787
Base Score: 4.6
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 5.6
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H
Impact Score: 4.7
Exploitability Score: 0.8
Severity: MEDIUM