CVE-2020-25656

medium

Description

A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.

References

https://lkml.org/lkml/2020/10/29/528

https://lkml.org/lkml/2020/10/16/84

https://bugzilla.redhat.com/show_bug.cgi?id=1888726

https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html

https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html

Details

Source: MITRE

Published: 2020-12-02

Updated: 2022-04-01

Type: CWE-416

Risk Information

CVSS v2

Base Score: 1.9

Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3

Base Score: 4.1

Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 0.5

Severity: MEDIUM