What is CVE-2023-52921?

CVE-2023-52921 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 6.2 onward and patched in 6.4.11 and 6.5. CVE-2023-52921 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52921?

CVE-2023-52921 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-2023-52921?

Yes, CVE-2023-52921 has been patched. Fixed versions include 6.4.11 and 6.5. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-52921 actively exploited?

CVE-2023-52921 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-2023-52921

High

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix possible UAF in amdgpu_cs_pass1() Since the gang_size check is outside of chunk parsing loop, we need to reset i before we free the chunk data. Suggested by Ye Zhang (@VAR10CK) of Baidu Security.

Package Linux Kernel

Published 2024-11-19

Last modified 2025-06-19

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-2023-52921 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 6.2 and later are affected. Fixed in 6.4.11, 6.5 and their respective stable series.

Affected from

≥ 6.2

Fixed in

✓ 6.4.11 6.4.x ✓ 6.5

References

2 total

Kernel Git
https://git.kernel.org/stable/c/90e065677e0362a777b9db97ea21d43a39211399

Patch
Kernel Git
https://git.kernel.org/stable/c/e08e9dd09809b16f8f8cee8c466841b33d24ed96

Patch

Details

CVE ID CVE-2023-52921

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-11-19

Modified 2025-06-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-52921?

CVE-2023-52921 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 6.2 onward and has been patched in 6.4.11 and 6.5. CVE-2023-52921 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52921?

CVE-2023-52921 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-2023-52921?

Yes. CVE-2023-52921 has been patched. Fixed versions include 6.4.11 and 6.5. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-52921 actively exploited?

No. CVE-2023-52921 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.