linux-cve-announce - CVE-2024-57995: wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to

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Message-ID: <2025022640-CVE-2024-57995-892d@gregkh>
Date: Wed, 26 Feb 2025 18:05:54 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-57995: wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()

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

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

wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()

In ath12k_mac_assign_vif_to_vdev(), if arvif is created on a different
radio, it gets deleted from that radio through a call to
ath12k_mac_unassign_link_vif(). This action frees the arvif pointer.
Subsequently, there is a check involving arvif, which will result in a
read-after-free scenario.

Fix this by moving this check after arvif is again assigned via call to
ath12k_mac_assign_link_vif().

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1

The Linux kernel CVE team has assigned CVE-2024-57995 to this issue.


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

	Issue introduced in 6.10 with commit b5068bc9180d06a5ac242b0f9263047c14f86211 and fixed in 6.13.2 with commit f3a95a312419e4f1e992525917da9dbcd247038f
	Issue introduced in 6.10 with commit b5068bc9180d06a5ac242b0f9263047c14f86211 and fixed in 6.14-rc1 with commit 5a10971c7645a95f5d5dc23c26fbac4bf61801d0

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-2024-57995
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/f3a95a312419e4f1e992525917da9dbcd247038f
	https://git.kernel.org/stable/c/5a10971c7645a95f5d5dc23c26fbac4bf61801d0