CVE-2021-45868

Description

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.

CvssV3 impact

Version

3.1

VectorString

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

AttackVector

LOCAL

AttackComplexity

LOW

PrivilegesRequired

NONE

UserInteraction

REQUIRED

Scope

UNCHANGED

ConfidentialityImpact

NONE

IntegrityImpact

NONE

AvailabilityImpact

HIGH

BaseScore

5.5

BaseSeverity

MEDIUM

CvssV2 impact

Version

2.0

VectorString

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

AccessVector

NETWORK

AccessComplexity

MEDIUM

Authentication

NONE

ConfidentialityImpact

NONE

IntegrityImpact

NONE

AvailabilityImpact

PARTIAL

BaseScore

4.300000190734863