CVE-2021-4083

CVSS V2 Medium 6.9 CVSS V3 High 7

Description

A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system. This flaw affects Linux kernel versions prior to 5.16-rc4.

Overview

CVE ID
CVE-2021-4083

Assigner
secalert@redhat.com

Vulnerability Status
Analyzed

Published Version
2022-01-18T17:15:09

Last Modified Date
2023-02-24T15:11:32

Weakness Enumerations

CWE	URL
CWE-416	http://cwe.mitre.org/data/definitions/416.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version End
		AND
cpe:2.3:o:linux:linux_kernel::::::::	1	OR	5.15
cpe:2.3:o:linux:linux_kernel:5.16:rc1::::::	1	OR
cpe:2.3:o:linux:linux_kernel:5.16:rc2::::::	1	OR
cpe:2.3:o:linux:linux_kernel:5.16:rc3::::::	1	OR
		AND
cpe:2.3:o:netapp:h410c_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h410c:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h300s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h300s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h500s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h500s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h700s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h700s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h300e_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h300e:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h500e_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h500e:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h700e_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h700e:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h410s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h410s:-:::::::*	0	OR
		AND
cpe:2.3:o:debian:debian_linux:9.0:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:10.0:::::::*	1	OR
		AND
cpe:2.3:a:netapp:hci_management_node:-:::::::*	1	OR
cpe:2.3:a:netapp:solidfire:-:::::::*	1	OR

CVSS Version 2

Version
2.0

Vector String
AV:L/AC:M/Au:N/C:C/I:C/A:C

Access Vector
LOCAL

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
COMPLETE

Integrity Impact
COMPLETE

Availability Impact
COMPLETE

Base Score
6.9

Severity
MEDIUM

Exploitability Score
3.4

Impact Score
10

CVSS Version 3

Version
3.1

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

Attack Vector
LOCAL

Attack Compatibility
HIGH

Privileges Required
LOW

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
7

Base Severity
HIGH

Exploitability Score
1

Impact Score
5.9

References

Reference URL	Reference Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2029923	Issue Tracking Patch Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=054aa8d439b9	Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20220217-0005/	Third Party Advisory
https://www.debian.org/security/2022/dsa-5096	Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-4083
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4083

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 15:45:33				Added to TrackCVE
2022-12-06 06:54:03	2022-01-18T17:15Z	2022-01-18T17:15:09	CVE Published Date	updated
2022-12-06 06:54:03		2022-07-25T18:18:27	CVE Modified Date	updated
2022-12-06 06:54:03		Modified	Vulnerability Status	updated
2022-12-06 06:54:09			References	updated
2022-12-30 15:12:57	Modified	Undergoing Analysis	Vulnerability Status	updated
2023-02-24 15:12:06		2023-02-24T15:11:32	CVE Modified Date	updated
2023-02-24 15:12:06	Undergoing Analysis	Analyzed	Vulnerability Status	updated