linux-cve-announce - CVE-2024-50206: net: ethernet: mtk_eth_soc: fix memory corruption during fq dma init

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Message-ID: <2024110806-CVE-2024-50206-6111@gregkh>
Date: Fri,  8 Nov 2024 07:08:07 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-50206: net: ethernet: mtk_eth_soc: fix memory corruption during fq dma init

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

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

net: ethernet: mtk_eth_soc: fix memory corruption during fq dma init

The loop responsible for allocating up to MTK_FQ_DMA_LENGTH buffers must
only touch as many descriptors, otherwise it ends up corrupting unrelated
memory. Fix the loop iteration count accordingly.

The Linux kernel CVE team has assigned CVE-2024-50206 to this issue.


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

	Issue introduced in 6.10 with commit c57e55819443 and fixed in 6.11.6 with commit 68cd084e3ec1
	Issue introduced in 6.10 with commit c57e55819443 and fixed in 6.12-rc4 with commit 88806efc034a
	Issue introduced in 6.9.6 with commit 6f50d0bc1bbd

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-2024-50206
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/mediatek/mtk_eth_soc.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/68cd084e3ec1512cd383cb3e9cf0ab7ab413724c
	https://git.kernel.org/stable/c/88806efc034a9830f483963326b99930ad519af1