What is CVE-2023-53721?

CVE-2023-53721 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.3 onward and patched in 6.5.5 and 6.6. CVE-2023-53721 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53721?

CVE-2023-53721 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2023-53721?

Yes, CVE-2023-53721 has been patched. Fixed versions include 6.5.5 and 6.6. If you are running Linux kernel 6.3 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53721 actively exploited?

CVE-2023-53721 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53721

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Fix a NULL pointer dereference in ath12k_mac_op_hw_scan() In ath12k_mac_op_hw_scan(), the return value of kzalloc() is directly used in memcpy(), which may lead to a NULL pointer dereference on failure of kzalloc(). Fix this bug by adding a check of arg.extraie.ptr. Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Package Linux Kernel

Published 2025-10-22

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 6.3 and later are affected. Fixed in 6.5.5, 6.6 and their respective stable series.

Affected from

≥ 6.3

Fixed in

✓ 6.5.5 6.5.x ✓ 6.6

References

The following references provide additional information about CVE-2023-53721 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/5a263df398b581189fe632b4ab8440f3dd76c251
Patch
Kernel patch commit
https://git.kernel.org/stable/c/8ad314da54c6dd223a6b6cc85019160aa842f659
Patch

Frequently asked questions

What is CVE-2023-53721?

CVE-2023-53721 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.3 onward and has been patched in 6.5.5 and 6.6. CVE-2023-53721 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2023-53721?

Yes — CVE-2023-53721 has been patched. Fixed versions include 6.5.5 and 6.6. If you are running Linux kernel 6.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53721 actively exploited?

No — CVE-2023-53721 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.