What is CVE-2023-53746?

CVE-2023-53746 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 4.20 onward and patched in 5.4.240, 5.10.177, 5.15.106 and others. CVE-2023-53746 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53746?

CVE-2023-53746 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2023-53746?

Yes, CVE-2023-53746 has been patched. Fixed versions include 5.4.240, 5.10.177, 5.15.106 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53746 actively exploited?

CVE-2023-53746 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53746

In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: fix memory leak in vfio_ap device driver The device release callback function invoked to release the matrix device uses the dev_get_drvdata(device *dev) function to retrieve the pointer to the vfio_matrix_dev object in order to free its storage. The problem is, this object is not stored as drvdata with the device; since the kfree function will accept a NULL pointer, the memory for the vfio_matrix_dev object is never freed. Since the device being released is contained within the vfio_matrix_dev object, the container_of macro will be used to retrieve its pointer.

Package Linux Kernel

Published 2025-12-08

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 4.20 and later are affected. Fixed in 5.4.240, 5.10.177, 5.15.106, 6.1.23, 6.2.10, 6.3 and their respective stable series.

Affected from

≥ 4.20

Fixed in

✓ 5.4.240 5.4.x ✓ 5.10.177 5.10.x ✓ 5.15.106 5.15.x ✓ 6.1.23 6.1.x ✓ 6.2.10 6.2.x ✓ 6.3

References

The following references provide additional information about CVE-2023-53746 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/5195de1d5f66b276683240a896783f7f43c4f664
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6a40fda14b4be3e38f03cc42ffd4efbc64fb3e67
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7b6a02f5bf15931464c79dfd487c57f76aae3496
Patch

6 patch commits total View all on NVD

Frequently asked questions

What is CVE-2023-53746?

CVE-2023-53746 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.20 onward and has been patched in 5.4.240, 5.10.177, 5.15.106 and others. CVE-2023-53746 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2023-53746?

Yes — CVE-2023-53746 has been patched. Fixed versions include 5.4.240, 5.10.177, 5.15.106 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53746 actively exploited?

No — CVE-2023-53746 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.