linux-cve-announce - CVE-2023-53721: wifi: ath12k: Fix a NULL pointer dereference in ath12k_mac_op_hw

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Message-ID: <2025102214-CVE-2023-53721-f0ca@gregkh>
Date: Wed, 22 Oct 2025 15:25:00 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53721: wifi: ath12k: Fix a NULL pointer dereference in ath12k_mac_op_hw_scan()

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

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

The Linux kernel CVE team has assigned CVE-2023-53721 to this issue.


Affected and fixed versions
===========================

	Fixed in 6.5.5 with commit 5a263df398b581189fe632b4ab8440f3dd76c251
	Fixed in 6.6 with commit 8ad314da54c6dd223a6b6cc85019160aa842f659

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2023-53721
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/net/wireless/ath/ath12k/mac.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/5a263df398b581189fe632b4ab8440f3dd76c251
	https://git.kernel.org/stable/c/8ad314da54c6dd223a6b6cc85019160aa842f659