CVE-2021-45868

2022-03-1800:00:00

ubuntu.com

linux kernel

quota tree

file system

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

38.1%

JSON

In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate
the block number in the quota tree (on disk). This can, for example, lead
to a kernel/locking/rwsem.c use-after-free if there is a corrupted quota
file.

Bugs

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-167.175UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-97.110UNKNOWN
ubuntu21.10noarchlinux< 5.13.0-28.31UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-239.273UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1119.127UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1064.67UNKNOWN
ubuntu21.10noarchlinux-aws< 5.13.0-1012.13UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1117.123UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1155.170UNKNOWN
ubuntu20.04noarchlinux-aws-5.13< 5.13.0-1012.13~20.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-167.175	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-97.110	UNKNOWN
ubuntu	21.10	noarch	linux	< 5.13.0-28.31	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-239.273	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1119.127	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1064.67	UNKNOWN
ubuntu	21.10	noarch	linux-aws	< 5.13.0-1012.13	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1117.123	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1155.170	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.13	< 5.13.0-1012.13~20.04.1	UNKNOWN