What is CVE-2023-52439?

CVE-2023-52439 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10. CVE-2023-52439 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52439?

CVE-2023-52439 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-2023-52439?

No patch is currently available for CVE-2023-52439. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-52439 actively exploited?

CVE-2023-52439 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-52439

High

In the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(&idev->dev) put_device(&idev->dev) uio_device_release get_device(&idev->dev) kfree(idev) uio_free_minor(minor) uio_release put_device(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, the idev will be double freed. To address this issue, we can get idev atomic & inc idev reference with minor_lock.

Package Linux Kernel

Published 2024-02-20

Last modified 2024-12-27

CVSS version 3.1

Patch available

Awaiting data

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-415

CVE-2023-52439 is classified as CWE-415

See CWE-415 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2023-52439 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
Debian Security
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Security
https://security.netapp.com/advisory/ntap-20241227-0006/
Kernel patch commit
https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2
Patch
Kernel patch commit
https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea
Patch
Kernel patch commit
https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2023-52439

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-02-20

Modified 2024-12-27

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-52439?

CVE-2023-52439 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . CVE-2023-52439 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52439?

CVE-2023-52439 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-2023-52439?

No patch is currently available for CVE-2023-52439. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-52439 actively exploited?

No — CVE-2023-52439 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.