CVE-2020-28974

medium

Description

A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.

References

Advisories
More

https://security.netapp.com/advisory/ntap-20210108-0003/

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

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

http://www.openwall.com/lists/oss-security/2020/11/25/1

https://seclists.org/oss-sec/2020/q4/104

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7

Details

Source: Mitre, NVD

Published: 2020-11-20

Updated: 2021-01-27

Risk Information

CVSS v2

Base Score: 6.1

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:C

Severity: Medium

CVSS v3

Base Score: 5

Vector: CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H

Severity: Medium

EPSS

EPSS: 0.00096