linux-cve-announce - CVE-2023-53008: cifs: fix potential memory leaks in session setup

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Message-ID: <2025032714-CVE-2023-53008-415c@gregkh>
Date: Thu, 27 Mar 2025 17:43:55 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2023-53008: cifs: fix potential memory leaks in session setup

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

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

cifs: fix potential memory leaks in session setup

Make sure to free cifs_ses::auth_key.response before allocating it as
we might end up leaking memory in reconnect or mounting.

The Linux kernel CVE team has assigned CVE-2023-53008 to this issue.


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

	Fixed in 6.1.9 with commit 893d45394dbe4b5cbf3723c19e2ccc8b93a6ac9b
	Fixed in 6.2 with commit 2fe58d977ee05da5bb89ef5dc4f5bf2dc15db46f

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-2023-53008
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:
	fs/cifs/cifsencrypt.c
	fs/cifs/sess.c
	fs/cifs/smb2pdu.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/893d45394dbe4b5cbf3723c19e2ccc8b93a6ac9b
	https://git.kernel.org/stable/c/2fe58d977ee05da5bb89ef5dc4f5bf2dc15db46f