CVE-2021-4023

2022-03-1000:00:00

ubuntu.com

linux kernel

io-workqueue

5.15-rc1

system crash

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

Percentile

5.1%

JSON

A flaw was found in the io-workqueue implementation in the Linux kernel
versions prior to 5.15-rc1. The kernel can panic when an improper
cancellation operation triggers the submission of new io-uring operations
during a shortage of free space. This flaw allows a local user with
permissions to execute io-uring requests to possibly crash the system.