CVE-2020-25669

2020-11-0500:00:00

ubuntu.com

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.001 Low

EPSS

Percentile

20.3%

JSON

A vulnerability was found in the Linux Kernel where the function
sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being
freed. Though the dangling pointer is set to NULL in sunkbd_disconnect,
there is still an alias in sunkbd_reinit causing Use After Free.

Notes

Author	Note
sbeattie	issue is specific to the sun4/sun5 keyboard driver.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-136.140UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-66.74UNKNOWN
ubuntu20.10noarchlinux< 5.8.0-44.50UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-201.233UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1094.101UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1038.40UNKNOWN
ubuntu20.10noarchlinux-aws< 5.8.0-1024.26UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1085.89) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1121.135UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1038.40~18.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-136.140	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-66.74	UNKNOWN
ubuntu	20.10	noarch	linux	< 5.8.0-44.50	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-201.233	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1094.101	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1038.40	UNKNOWN
ubuntu	20.10	noarch	linux-aws	< 5.8.0-1024.26	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1085.89) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1121.135	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1038.40~18.04.1	UNKNOWN