linux-cve-announce - CVE-2025-21741: usbnet: ipheth: fix DPE OoB read

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Message-ID: <2025022600-CVE-2025-21741-cbfd@gregkh>
Date: Wed, 26 Feb 2025 18:11:23 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-21741: usbnet: ipheth: fix DPE OoB read

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

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

usbnet: ipheth: fix DPE OoB read

Fix an out-of-bounds DPE read, limit the number of processed DPEs to
the amount that fits into the fixed-size NDP16 header.

The Linux kernel CVE team has assigned CVE-2025-21741 to this issue.


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

	Issue introduced in 6.5 with commit a2d274c62e44b1995c170595db3865c6fe701226 and fixed in 6.6.78 with commit 22475242ddb70e35c9148234be9a3aa9fb8efff9
	Issue introduced in 6.5 with commit a2d274c62e44b1995c170595db3865c6fe701226 and fixed in 6.12.14 with commit 5835bf66c50ac2b85ed28b282c2456c3516ef0a6
	Issue introduced in 6.5 with commit a2d274c62e44b1995c170595db3865c6fe701226 and fixed in 6.13.3 with commit 971b8c572559e52d32a2b82f2d9e0685439a0117
	Issue introduced in 6.5 with commit a2d274c62e44b1995c170595db3865c6fe701226 and fixed in 6.14-rc1 with commit ee591f2b281721171896117f9946fced31441418

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-2025-21741
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/usb/ipheth.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/22475242ddb70e35c9148234be9a3aa9fb8efff9
	https://git.kernel.org/stable/c/5835bf66c50ac2b85ed28b282c2456c3516ef0a6
	https://git.kernel.org/stable/c/971b8c572559e52d32a2b82f2d9e0685439a0117
	https://git.kernel.org/stable/c/ee591f2b281721171896117f9946fced31441418