What is CVE-2021-47232?

CVE-2021-47232 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2021-47232 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47232?

CVE-2021-47232 has a CVSS score of 8.4 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47232?

No patch is currently available for CVE-2021-47232. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47232 actively exploited?

CVE-2021-47232 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-2021-47232

High

In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while in use This patch fixes a Use-after-Free found by the syzbot. The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-04

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

8.4

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2021-47232 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

References

The following references provide additional information about CVE-2021-47232 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678
Patch
Kernel patch commit
https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2021-47232

Severity High

CVSS score 8.4 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-04-04

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47232?

CVE-2021-47232 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2021-47232 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47232?

CVE-2021-47232 has a CVSS score of 8.4 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47232?

No patch is currently available for CVE-2021-47232. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47232 actively exploited?

No — CVE-2021-47232 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (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. View CWE-416 on MITRE CWE →