What is CVE-2023-52576?

CVE-2023-52576 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 5.13 onward and patched in 6.1.56, 6.5.6 and 6.6. CVE-2023-52576 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52576?

CVE-2023-52576 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-52576?

Yes, CVE-2023-52576 has been patched. Fixed versions include 6.1.56, 6.5.6 and 6.6. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-52576 actively exploited?

CVE-2023-52576 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-2023-52576

Medium

In the Linux kernel, the following vulnerability has been resolved: x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer() The code calling ima_free_kexec_buffer() runs long after the memblock allocator has already been torn down, potentially resulting in a use after free in memblock_isolate_range(). With KASAN or KFENCE, this use after free will result in a BUG from the idle task, and a subsequent kernel panic. Switch ima_free_kexec_buffer() over to memblock_free_late() to avoid that bug.

Package Linux Kernel

Published 2024-03-02

Last modified 2025-04-08

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2023-52576 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 5.13 and later are affected. Fixed in 6.1.56, 6.5.6, 6.6 and their respective stable series.

Affected from

≥ 5.13

Fixed in

✓ 6.1.56 6.1.x ✓ 6.5.6 6.5.x ✓ 6.6

References

3 total

Kernel Git
https://git.kernel.org/stable/c/34cf99c250d5cd2530b93a57b0de31d3aaf8685b

Patch
Kernel Git
https://git.kernel.org/stable/c/d2dfbc0e3b7a04c2d941421a958dc31c897fb204

Patch
Kernel Git
https://git.kernel.org/stable/c/eef16bfdb212da60f5144689f2967fb25b051a2b

Patch

Details

CVE ID CVE-2023-52576

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-03-02

Modified 2025-04-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-52576?

CVE-2023-52576 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 5.13 onward and has been patched in 6.1.56, 6.5.6 and 6.6. CVE-2023-52576 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52576?

CVE-2023-52576 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-52576?

Yes. CVE-2023-52576 has been patched. Fixed versions include 6.1.56, 6.5.6 and 6.6. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-52576 actively exploited?

No. CVE-2023-52576 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.