What is CVE-2021-47596?

CVE-2021-47596 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 5.8 onward and patched in 5.10.88, 5.15.11 and 5.16. CVE-2021-47596 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47596?

CVE-2021-47596 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-2021-47596?

Yes, CVE-2021-47596 has been patched. Fixed versions include 5.10.88, 5.15.11 and 5.16. If you are running Linux kernel 5.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47596 actively exploited?

CVE-2021-47596 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-2021-47596

High

In the Linux kernel, the following vulnerability has been resolved: net: hns3: fix use-after-free bug in hclgevf_send_mbx_msg Currently, the hns3_remove function firstly uninstall client instance, and then uninstall acceletion engine device. The netdevice is freed in client instance uninstall process, but acceletion engine device uninstall process still use it to trace runtime information. This causes a use after free problem. So fixes it by check the instance register state to avoid use after free.

Package Linux Kernel

Published 2024-06-19

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-2021-47596 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 5.8 and later are affected. Fixed in 5.10.88, 5.15.11, 5.16 and their respective stable series.

Affected from

≥ 5.8

Fixed in

✓ 5.10.88 5.10.x ✓ 5.15.11 5.15.x ✓ 5.16

References

3 total

Kernel Git
https://git.kernel.org/stable/c/12512bc8f25b8ba9795dfbae0e9ca57ff13fd542

Patch
Kernel Git
https://git.kernel.org/stable/c/27cbf64a766e86f068ce6214f04c00ceb4db1af4

Patch
Kernel Git
https://git.kernel.org/stable/c/4f4a353f6fe033807cd026a5de81c67469ff19b0

Patch

Details

CVE ID CVE-2021-47596

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-06-19

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47596?

CVE-2021-47596 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 5.8 onward and has been patched in 5.10.88, 5.15.11 and 5.16. CVE-2021-47596 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47596?

CVE-2021-47596 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-2021-47596?

Yes. CVE-2021-47596 has been patched. Fixed versions include 5.10.88, 5.15.11 and 5.16. If you are running Linux kernel 5.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47596 actively exploited?

No. CVE-2021-47596 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.