CVE-2021-4157

2022-03-2500:00:00

ubuntu.com

8 High

CVSS3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.4 High

CVSS2

Access Vector

ADJACENT_NETWORK

Access Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:A/AC:M/Au:S/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

43.0%

JSON

An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux
kernel NFS subsystem was found in the way users use mirroring (replication
of files with NFS). A user, having access to the NFS mount, could
potentially use this flaw to crash the system or escalate privileges on the
system.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-151.157UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-224.257) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux< 5.4.0-80.90UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1104.109) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1140.154) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1109.116UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1054.57UNKNOWN
ubuntu20.04noarchlinux-aws-5.11< 5.11.0-1014.15~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1054.57~18.04.1UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1109.116~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-151.157	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-224.257) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-80.90	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1104.109) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1140.154) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1109.116	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1054.57	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.11	< 5.11.0-1014.15~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1054.57~18.04.1	UNKNOWN
ubuntu	16.04	noarch	linux-aws-hwe	< 4.15.0-1109.116~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN