CVE-2021-20226

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.

CVSS v3.0 7.8 HIGH
CVSS v2.0 6.1 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.1^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.9 / Impact : 8.5

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact COMPLETE

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1873476	Issue Tracking Third Party Advisory
https://security.netapp.com/advisory/ntap-20210401-0001/	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

Configuration 2 (hide)

cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*

History

28 Jul 2023, 17:12

Type	Values Removed	Values Added
CPE	cpe:2.3:o:linux:linux_kernel:-:::::::*	cpe:2.3:o:linux:linux_kernel::::::::

Information

Published : 2021-02-23 17:15

Updated : 2023-07-28 17:12

NVD link : CVE-2021-20226

Mitre link : CVE-2021-20226

JSON object : View

Products Affected

linux

linux_kernel

netapp

cloud_backup

CWE

CWE-416

Use After Free

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