linux-cve-announce - CVE-2023-54129: octeontx2-af: Add validation for lmac type

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Message-ID: <2025122419-CVE-2023-54129-8cb3@gregkh>
Date: Wed, 24 Dec 2025 14:07:26 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54129: octeontx2-af: Add validation for lmac type

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

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

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

octeontx2-af: Add validation for lmac type

Upon physical link change, firmware reports to the kernel about the
change along with the details like speed, lmac_type_id, etc.
Kernel derives lmac_type based on lmac_type_id received from firmware.

In a few scenarios, firmware returns an invalid lmac_type_id, which
is resulting in below kernel panic. This patch adds the missing
validation of the lmac_type_id field.

Internal error: Oops: 96000005 [#1] PREEMPT SMP
[   35.321595] Modules linked in:
[   35.328982] CPU: 0 PID: 31 Comm: kworker/0:1 Not tainted
5.4.210-g2e3169d8e1bc-dirty #17
[   35.337014] Hardware name: Marvell CN103XX board (DT)
[   35.344297] Workqueue: events work_for_cpu_fn
[   35.352730] pstate: 40400089 (nZcv daIf +PAN -UAO)
[   35.360267] pc : strncpy+0x10/0x30
[   35.366595] lr : cgx_link_change_handler+0x90/0x180

The Linux kernel CVE team has assigned CVE-2023-54129 to this issue.


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

	Issue introduced in 4.20 with commit 61071a871ea6eb2125ece91c1a0dbb124a318c8a and fixed in 6.1.32 with commit 83a7f27c5b94e43f29f8216a32790751139aa61e
	Issue introduced in 4.20 with commit 61071a871ea6eb2125ece91c1a0dbb124a318c8a and fixed in 6.2.16 with commit afd7660c766c4d317feae004e5cd829390bbc4b0
	Issue introduced in 4.20 with commit 61071a871ea6eb2125ece91c1a0dbb124a318c8a and fixed in 6.3.3 with commit 5c0268b141ad612b6fca13d3a66cfda111716dbb
	Issue introduced in 4.20 with commit 61071a871ea6eb2125ece91c1a0dbb124a318c8a and fixed in 6.4 with commit cb5edce271764524b88b1a6866b3e626686d9a33

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-2023-54129
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/octeontx2/af/cgx.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/83a7f27c5b94e43f29f8216a32790751139aa61e
	https://git.kernel.org/stable/c/afd7660c766c4d317feae004e5cd829390bbc4b0
	https://git.kernel.org/stable/c/5c0268b141ad612b6fca13d3a66cfda111716dbb
	https://git.kernel.org/stable/c/cb5edce271764524b88b1a6866b3e626686d9a33