CVE-2020-13974

HIGH

Description

An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. NOTE: Members in the community argue that the integer overflow does not lead to a security issue in this case.

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=dad0bf9ce93fa40b667eccd3306783f4db4b932b

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b86dab054059b970111b5516ae548efaae5b3aae

https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html

https://lkml.org/lkml/2020/3/22/482

https://usn.ubuntu.com/4427-1/

https://usn.ubuntu.com/4439-1/

https://usn.ubuntu.com/4440-1/

https://usn.ubuntu.com/4483-1/

https://usn.ubuntu.com/4485-1/

Details

Source: MITRE

Published: 2020-06-09

Updated: 2021-01-04

Type: CWE-190

Risk Information

CVSS v2.0

Base Score: 7.2

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

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3.0

Base Score: 7.8

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

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH