linux-cve-announce - CVE-2023-53638: octeon_ep: cancel queued works in probe error path

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Message-ID: <2025100715-CVE-2023-53638-ded7@gregkh>
Date: Tue,  7 Oct 2025 17:19:43 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53638: octeon_ep: cancel queued works in probe error path

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

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

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

octeon_ep: cancel queued works in probe error path

If it fails to get the devices's MAC address, octep_probe exits while
leaving the delayed work intr_poll_task queued. When the work later
runs, it's a use after free.

Move the cancelation of intr_poll_task from octep_remove into
octep_device_cleanup. This does not change anything in the octep_remove
flow, but octep_device_cleanup is called also in the octep_probe error
path, where the cancelation is needed.

Note that the cancelation of ctrl_mbox_task has to follow
intr_poll_task's, because the ctrl_mbox_task may be queued by
intr_poll_task.

The Linux kernel CVE team has assigned CVE-2023-53638 to this issue.

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

	Issue introduced in 6.4 with commit 24d4333233b378114106a1327d3d635a004f4387 and fixed in 6.4.12 with commit 62312e2f6466b5f0a120542a38b410d88a34ed00
	Issue introduced in 6.4 with commit 24d4333233b378114106a1327d3d635a004f4387 and fixed in 6.5 with commit 758c91078165ae641b698750a72eafe7968b3756

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-2023-53638
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/ethernet/marvell/octeon_ep/octep_main.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/62312e2f6466b5f0a120542a38b410d88a34ed00
	https://git.kernel.org/stable/c/758c91078165ae641b698750a72eafe7968b3756