What is CVE-2021-47571?

CVE-2021-47571 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 3.2 onward and patched in 4.4.294, 4.9.292, 4.14.257 and others. CVE-2021-47571 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47571?

CVE-2021-47571 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47571?

Yes, CVE-2021-47571 has been patched. Fixed versions include 4.4.294, 4.9.292, 4.14.257 and others. If you are running Linux kernel 3.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47571 actively exploited?

CVE-2021-47571 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2021-47571

High

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect() The free_rtllib() function frees the "dev" pointer so there is use after free on the next line. Re-arrange things to avoid that.

Package Linux Kernel

Published 2024-05-24

Last modified 2024-11-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2021-47571 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.2 and later are affected. Fixed in 4.4.294, 4.9.292, 4.14.257, 4.19.219, 5.4.163, 5.10.83, 5.15.6, 5.16 and their respective stable series.

Affected from

≥ 3.2

Fixed in

✓ 4.4.294 4.4.x ✓ 4.9.292 4.9.x ✓ 4.14.257 4.14.x ✓ 4.19.219 4.19.x ✓ 5.4.163 5.4.x ✓ 5.10.83 5.10.x ✓ 5.15.6 5.15.x ✓ 5.16

References

8 total

Kernel Git
https://git.kernel.org/stable/c/2e1ec01af2c7139c6a600bbfaea1a018b35094b6

Patch
Kernel Git
https://git.kernel.org/stable/c/8d0163cec7de995f9eb9c3128c83fb84f0cb1c64

Patch
Kernel Git
https://git.kernel.org/stable/c/9186680382934b0e7529d3d70dcc0a21d087683b

Patch
Kernel Git
https://git.kernel.org/stable/c/b535917c51acc97fb0761b1edec85f1f3d02bda4

Patch
Kernel Git
https://git.kernel.org/stable/c/bca19bb2dc2d89ce60c4a4a6e59609d4cf2e13ef

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47571

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-05-24

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47571?

CVE-2021-47571 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 3.2 onward and has been patched in 4.4.294, 4.9.292, 4.14.257 and others. CVE-2021-47571 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47571?

CVE-2021-47571 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47571?

Yes. CVE-2021-47571 has been patched. Fixed versions include 4.4.294, 4.9.292, 4.14.257 and others. If you are running Linux kernel 3.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47571 actively exploited?

No. CVE-2021-47571 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.