linux-cve-announce - CVE-2023-54162: ksmbd: fix possible memory leak in smb2

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Message-ID: <2025123029-CVE-2023-54162-4725@gregkh>
Date: Tue, 30 Dec 2025 13:03:30 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54162: ksmbd: fix possible memory leak in smb2_lock()

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

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

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

ksmbd: fix possible memory leak in smb2_lock()

argv needs to be free when setup_async_work fails or when the current
process is woken up.

The Linux kernel CVE team has assigned CVE-2023-54162 to this issue.


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

	Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 5.15.145 with commit bfe8372ef2dbdce97f13b21d76e2080ddeef5a79
	Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 6.1.16 with commit 6bf555ed8938444466c3d7f3252eb874a518f293
	Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 6.2.3 with commit 11d38f8a0c19763e34d2093b5ecb640e012cb2d2
	Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 6.3 with commit d3ca9f7aeba793d74361d88a8800b2f205c9236b

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-2023-54162
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/ksmbd/smb2pdu.c
	fs/ksmbd/vfs_cache.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/bfe8372ef2dbdce97f13b21d76e2080ddeef5a79
	https://git.kernel.org/stable/c/6bf555ed8938444466c3d7f3252eb874a518f293
	https://git.kernel.org/stable/c/11d38f8a0c19763e34d2093b5ecb640e012cb2d2
	https://git.kernel.org/stable/c/d3ca9f7aeba793d74361d88a8800b2f205c9236b