linux-cve-announce - CVE-2025-38121: wifi: iwlwifi: mld: avoid panic on init failure

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Message-ID: <2025070327-CVE-2025-38121-5390@gregkh>
Date: Thu,  3 Jul 2025 10:35:38 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38121: wifi: iwlwifi: mld: avoid panic on init failure

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

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

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

wifi: iwlwifi: mld: avoid panic on init failure

In case of an error during init, in_hw_restart will be set, but it will
never get cleared.
Instead, we will retry to init again, and then we will act like we are in a
restart when we are actually not.

This causes (among others) to a NULL pointer dereference when canceling
rx_omi::finished_work, that was not even initialized, because we thought
that we are in hw_restart.

Set in_hw_restart to true only if the fw is running, then we know that
FW was loaded successfully and we are not going to the retry loop.

The Linux kernel CVE team has assigned CVE-2025-38121 to this issue.


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

	Issue introduced in 6.14 with commit 7391b2a4f7dbb7be7dd763bc87506c10f570a8d3 and fixed in 6.15.3 with commit a26ec8e16958b6dd37dac9daf5fb6978fe0cb0b8
	Issue introduced in 6.14 with commit 7391b2a4f7dbb7be7dd763bc87506c10f570a8d3 and fixed in 6.16-rc1 with commit 960c7e6d388034d219dafffa6da0a5c2ccd5ff30

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-2025-38121
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/mld/mld.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/a26ec8e16958b6dd37dac9daf5fb6978fe0cb0b8
	https://git.kernel.org/stable/c/960c7e6d388034d219dafffa6da0a5c2ccd5ff30