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Debian Security Bug TrackerDEBIANCVE:CVE-2021-4023

HistoryMar 10, 2022 - 5:44 p.m.

CVE-2021-4023

2022-03-1017:44:50

Debian Security Bug Tracker

security-tracker.debian.org

flaw

linux kernel

io-workqueue

implementation

panic

cancellation operation

submission

io-uring operations

shortage

free space

local user

permissions

crash

system.

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.

OSVersionArchitecturePackageVersionFilename
Debian12alllinux< 5.15.3-1linux_5.15.3-1_all.deb
Debian11alllinux<= 5.10.223-1linux_5.10.223-1_all.deb
Debian999alllinux< 5.15.3-1linux_5.15.3-1_all.deb
Debian13alllinux< 5.15.3-1linux_5.15.3-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	linux	< 5.15.3-1	linux_5.15.3-1_all.deb
Debian	11	all	linux	<= 5.10.223-1	linux_5.10.223-1_all.deb
Debian	999	all	linux	< 5.15.3-1	linux_5.15.3-1_all.deb
Debian	13	all	linux	< 5.15.3-1	linux_5.15.3-1_all.deb