linux-cve-announce - CVE-2025-38656: wifi: iwlwifi: Fix error code in iwl_op_mode_dvm

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Message-ID: <2025082238-CVE-2025-38656-32f1@gregkh>
Date: Fri, 22 Aug 2025 18:01:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38656: wifi: iwlwifi: Fix error code in iwl_op_mode_dvm_start()

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

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

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

wifi: iwlwifi: Fix error code in iwl_op_mode_dvm_start()

Preserve the error code if iwl_setup_deferred_work() fails.  The current
code returns ERR_PTR(0) (which is NULL) on this path.  I believe the
missing error code potentially leads to a use after free involving
debugfs.

The Linux kernel CVE team has assigned CVE-2025-38656 to this issue.


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

	Issue introduced in 6.1.148 with commit 6663c52608d8d8727bf1911e6d9218069ba1c85e
	Issue introduced in 6.6.102 with commit ca980f1911a7144d451d1c31298ab8507c6bd88f
	Issue introduced in 6.12.42 with commit 7dd6350307af6521b6240b295c93b7eec4daebe6

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-2025-38656
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/intel/iwlwifi/dvm/main.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/991e2066f6009d3cb898413058c62dbcc92bd6d2
	https://git.kernel.org/stable/c/1d068272c21d886d06526454b68368100ba0a720
	https://git.kernel.org/stable/c/cf80c02a9fdb6c5bc8508beb6a0f6a1294fc32f6