What is CVE-2023-52837?

CVE-2023-52837 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 5.14 onward and patched in 6.1.63, 6.5.12, 6.6.2 and others. CVE-2023-52837 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52837?

CVE-2023-52837 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-2023-52837?

Yes, CVE-2023-52837 has been patched. Fixed versions include 6.1.63, 6.5.12, 6.6.2 and others. If you are running Linux kernel 5.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-52837 actively exploited?

CVE-2023-52837 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-2023-52837

High

In the Linux kernel, the following vulnerability has been resolved: nbd: fix uaf in nbd_open Commit 4af5f2e03013 ("nbd: use blk_mq_alloc_disk and blk_cleanup_disk") cleans up disk by blk_cleanup_disk() and it won't set disk->private_data as NULL as before. UAF may be triggered in nbd_open() if someone tries to open nbd device right after nbd_put() since nbd has been free in nbd_dev_remove(). Fix this by implementing ->free_disk and free private data in it.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-01-15

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-2023-52837 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 5.14 and later are affected. Fixed in 6.1.63, 6.5.12, 6.6.2, 6.7 and their respective stable series.

Affected from

≥ 5.14

Fixed in

✓ 6.1.63 6.1.x ✓ 6.5.12 6.5.x ✓ 6.6.2 6.6.x ✓ 6.7

References

4 total

Kernel Git
https://git.kernel.org/stable/c/327462725b0f759f093788dfbcb2f1fd132f956b

Patch
Kernel Git
https://git.kernel.org/stable/c/4e9b3ec84dc97909876641dad14e0a2300d6c2a3

Patch
Kernel Git
https://git.kernel.org/stable/c/56bd7901b5e9dbc9112036ea615ebcba1565fafe

Patch
Kernel Git
https://git.kernel.org/stable/c/879947f4180bc6e83af64eb0515e0cf57fce15db

Patch

Details

CVE ID CVE-2023-52837

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-01-15

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-52837?

CVE-2023-52837 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 5.14 onward and has been patched in 6.1.63, 6.5.12, 6.6.2 and others. CVE-2023-52837 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52837?

CVE-2023-52837 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-2023-52837?

Yes. CVE-2023-52837 has been patched. Fixed versions include 6.1.63, 6.5.12, 6.6.2 and others. If you are running Linux kernel 5.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-52837 actively exploited?

No. CVE-2023-52837 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.