CVE-2020-25668

2020-11-0200:00:00

ubuntu.com

cve-2020-25668

linux kernel

global variable

synchronized

use after free

con_font_op

CVSS2

6.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

21.6%

JSON

A flaw was found in Linux Kernel because access to the global variable
fg_console is not properly synchronized leading to a use after free in
con_font_op.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-129.132UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-59.65UNKNOWN
ubuntu20.10noarchlinux< 5.8.0-44.50UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-198.230UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1091.96UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1034.35UNKNOWN
ubuntu20.10noarchlinux-aws< 5.8.0-1024.26UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1083.87UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1119.133UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1034.35~18.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-129.132	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-59.65	UNKNOWN
ubuntu	20.10	noarch	linux	< 5.8.0-44.50	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-198.230	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1091.96	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1034.35	UNKNOWN
ubuntu	20.10	noarch	linux-aws	< 5.8.0-1024.26	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1083.87	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1119.133	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1034.35~18.04.1	UNKNOWN