linux-cve-announce - CVE-2023-54310: scsi: message: mptlan: Fix use after free bug in mptlan

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Message-ID: <2025123035-CVE-2023-54310-cc98@gregkh>
Date: Tue, 30 Dec 2025 13:24:03 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54310: scsi: message: mptlan: Fix use after free bug in mptlan_remove() due to race condition

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

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

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

scsi: message: mptlan: Fix use after free bug in mptlan_remove() due to race condition

mptlan_probe() calls mpt_register_lan_device() which initializes the
&priv->post_buckets_task workqueue. A call to
mpt_lan_wake_post_buckets_task() will subsequently start the work.

During driver unload in mptlan_remove() the following race may occur:

CPU0                  CPU1

                    |mpt_lan_post_receive_buckets_work()
mptlan_remove()     |
  free_netdev()     |
    kfree(dev);     |
                    |
                    | dev->mtu
                    |   //use

Fix this by finishing the work prior to cleaning up in mptlan_remove().

[mkp: we really should remove mptlan instead of attempting to fix it]

The Linux kernel CVE team has assigned CVE-2023-54310 to this issue.


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

	Fixed in 4.14.316 with commit 92f869693d84e813895ff4d25363744575515423
	Fixed in 4.19.284 with commit 60c8645ad6f5b722615383d595d63b62b07a13c3
	Fixed in 5.4.244 with commit 410e610a96c52a7b41e2ab6c9ca60868d9acecce
	Fixed in 5.10.181 with commit 697f92f8317e538d8409a0c95d6370eb40b34c05
	Fixed in 5.15.113 with commit e84282efc87f2414839f6e15c31b4daa34ebaac1
	Fixed in 6.1.30 with commit 9c6da3b7f12528cd52c458b33496a098b838fcfc
	Fixed in 6.3.4 with commit 48daa4a3015d859ee424948844ce3c12f2fe44e6
	Fixed in 6.4 with commit f486893288f3e9b171b836f43853a6426515d800

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-2023-54310
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/message/fusion/mptlan.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/92f869693d84e813895ff4d25363744575515423
	https://git.kernel.org/stable/c/60c8645ad6f5b722615383d595d63b62b07a13c3
	https://git.kernel.org/stable/c/410e610a96c52a7b41e2ab6c9ca60868d9acecce
	https://git.kernel.org/stable/c/697f92f8317e538d8409a0c95d6370eb40b34c05
	https://git.kernel.org/stable/c/e84282efc87f2414839f6e15c31b4daa34ebaac1
	https://git.kernel.org/stable/c/9c6da3b7f12528cd52c458b33496a098b838fcfc
	https://git.kernel.org/stable/c/48daa4a3015d859ee424948844ce3c12f2fe44e6
	https://git.kernel.org/stable/c/f486893288f3e9b171b836f43853a6426515d800