CVE-2021-4083

2022-01-1800:00:00

ubuntu.com

7 High

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

6.9 Medium

CVSS2

Access Vector

LOCAL

Access 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

0.0004 Low

EPSS

Percentile

9.0%

JSON

A read-after-free memory flaw was found in the Linux kernel’s garbage
collection for Unix domain socket file handlers in the way users call
close() and fget() simultaneously and can potentially trigger a race
condition. This flaw allows a local user to crash the system or escalate
their privileges on the system. This flaw affects Linux kernel versions
prior to 5.16-rc4.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux-aws-5.13< 5.13.0-1014.15~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1066.69~18.04.1UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1120.128~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu21.10noarchlinux-azure< 5.13.0-1014.16UNKNOWN
ubuntu14.04noarchlinux-azure< 4.15.0-1131.144~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1070.73UNKNOWN
ubuntu16.04noarchlinux-azure< 4.15.0-1131.144~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-azure-4.15< 4.15.0-1131.144UNKNOWN
ubuntu20.04noarchlinux-azure-5.13< 5.13.0-1014.16~20.04.1UNKNOWN
ubuntu18.04noarchlinux-azure-5.4< 5.4.0-1070.73~18.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux-aws-5.13	< 5.13.0-1014.15~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1066.69~18.04.1	UNKNOWN
ubuntu	16.04	noarch	linux-aws-hwe	< 4.15.0-1120.128~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	21.10	noarch	linux-azure	< 5.13.0-1014.16	UNKNOWN
ubuntu	14.04	noarch	linux-azure	< 4.15.0-1131.144~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1070.73	UNKNOWN
ubuntu	16.04	noarch	linux-azure	< 4.15.0-1131.144~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux-azure-4.15	< 4.15.0-1131.144	UNKNOWN
ubuntu	20.04	noarch	linux-azure-5.13	< 5.13.0-1014.16~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-azure-5.4	< 5.4.0-1070.73~18.04.1	UNKNOWN