linux-cve-announce - CVE-2023-53540: wifi: cfg80211: reject auth/assoc to AP with our address

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Message-ID: <2025100444-CVE-2023-53540-8805@gregkh>
Date: Sat,  4 Oct 2025 17:16:54 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53540: wifi: cfg80211: reject auth/assoc to AP with our address

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

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

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

wifi: cfg80211: reject auth/assoc to AP with our address

If the AP uses our own address as its MLD address or BSSID, then
clearly something's wrong. Reject such connections so we don't
try and fail later.

The Linux kernel CVE team has assigned CVE-2023-53540 to this issue.


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

	Fixed in 6.1.55 with commit 676a423410131d111a264d29aecbe6aadd57fb22
	Fixed in 6.5.5 with commit 07added2c6cd63de047bc786b39436322abb67c0
	Fixed in 6.6 with commit 5d4e04bf3a0f098bd9033de3a5291810fa14c7a6

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-2023-53540
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:
	net/wireless/mlme.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/676a423410131d111a264d29aecbe6aadd57fb22
	https://git.kernel.org/stable/c/07added2c6cd63de047bc786b39436322abb67c0
	https://git.kernel.org/stable/c/5d4e04bf3a0f098bd9033de3a5291810fa14c7a6