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ubuntucveUbuntu.comUB:CVE-2021-4197
HistoryDec 31, 2021 - 12:00 a.m.

CVE-2021-4197

2021-12-3100:00:00
ubuntu.com
ubuntu.com
33

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

0.0004 Low

EPSS

Percentile

9.0%

JSON

An unprivileged write to the file handler flaw in the Linux kernel’s
control groups and namespaces subsystem was found in the way users have
access to some less privileged process that are controlled by cgroups and
have higher privileged parent process. It is actually both for cgroup2 and
cgroup1 versions of control groups. A local user could use this flaw to
crash the system or escalate their privileges on the system.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-189.200UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-117.132UNKNOWN
ubuntu21.10noarchlinux< 5.13.0-37.42UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-229.263) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1137.148UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1078.84UNKNOWN
ubuntu21.10noarchlinux-aws< 5.13.0-1019.21UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1109.115) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1145.160) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-aws-5.13< 5.13.0-1019.21~20.04.1UNKNOWN
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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

0.0004 Low

EPSS

Percentile

9.0%

JSON
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