linux-cve-announce - CVE-2023-53602: wifi: ath11k: fix memory leak in WMI firmware stats

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Message-ID: <2025100431-CVE-2023-53602-2de6@gregkh>
Date: Sat,  4 Oct 2025 17:51:56 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53602: wifi: ath11k: fix memory leak in WMI firmware stats

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

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

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath11k: fix memory leak in WMI firmware stats

Memory allocated for firmware pdev, vdev and beacon statistics
are not released during rmmod.

Fix it by calling ath11k_fw_stats_free() function before hardware
unregister.

While at it, avoid calling ath11k_fw_stats_free() while processing
the firmware stats received in the WMI event because the local list
is getting spliced and reinitialised and hence there are no elements
in the list after splicing.

Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1

The Linux kernel CVE team has assigned CVE-2023-53602 to this issue.


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

	Fixed in 6.1.42 with commit 86f9330a49d1464849482298dd34d361859183eb
	Fixed in 6.4.7 with commit 55248d36beb79d3a61c9fb3122dc377fff523c89
	Fixed in 6.5 with commit 6aafa1c2d3e3fea2ebe84c018003f2a91722e607

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-2023-53602
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/ath11k/mac.c
	drivers/net/wireless/ath/ath11k/wmi.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/86f9330a49d1464849482298dd34d361859183eb
	https://git.kernel.org/stable/c/55248d36beb79d3a61c9fb3122dc377fff523c89
	https://git.kernel.org/stable/c/6aafa1c2d3e3fea2ebe84c018003f2a91722e607