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[email protected]NVD:CVE-2021-20226

HistoryFeb 23, 2021 - 5:15 p.m.

CVE-2021-20226

2021-02-2317:15:13

CWE-416

[email protected]

web.nvd.nist.gov

use-after-free

linux kernel

io_uring

local attacker

denial of service

data integrity

confidentiality

system availability

CVSS2

6.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

COMPLETE

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.007

Percentile

81.0%

JSON

A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.

Affected configurations

Nvd

Node

linuxlinux_kernelRange5.5–5.8.18

linuxlinux_kernelRange5.9.0–5.9.3

Node

netappcloud_backupMatch-

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
netappcloud_backup-cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*