CVE-2026-80814: rndis_host: add overflow check in rndis_rx_fixup()

CVE-2026-80814: rndis_host: add overflow check in rndis_rx_fixup()

[Greg Kroah-Hartman]

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

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

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

rndis_host: add overflow check in rndis_rx_fixup()

Add an overflow check to ensure that data_offset + data_len + 8 does not
wrap, which would enable an OOB read of the USB data buffer.

The Linux kernel CVE team has assigned CVE-2026-80814 to this issue.


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

	Fixed in 5.10.267 with commit 2140db1232af04b92faa6c4a2a40df6371ea89ff
	Fixed in 5.15.218 with commit 8ca3bd404d076495ed0b274b65971c57b6fd5ac0
	Fixed in 6.1.185 with commit f8e6fde5db87f855e99b200e392467274f0eb9d7
	Fixed in 6.6.154 with commit 10a6b99079697c5027b25352e882bdf54fef702a
	Fixed in 6.12.106 with commit c5398ce6db7647b7004d73a3102ccc25fb4bb596
	Fixed in 6.18.47 with commit e971d956353d382ee2185d71c47b538501a43f76
	Fixed in 7.1.11 with commit be7dc3650f799a253df4edd4fe230fc9ea4be063
	Fixed in 7.2.1 with commit 2ded89ca77fae1da6886fe94831acfe4d6aa80b1
	Fixed in 7.3-rc1 with commit 965a251f23ff69cfb4486974d4532e9bb551c7fc

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-2026-80814
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/rndis_host.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/2140db1232af04b92faa6c4a2a40df6371ea89ff
	https://git.kernel.org/stable/c/8ca3bd404d076495ed0b274b65971c57b6fd5ac0
	https://git.kernel.org/stable/c/f8e6fde5db87f855e99b200e392467274f0eb9d7
	https://git.kernel.org/stable/c/10a6b99079697c5027b25352e882bdf54fef702a
	https://git.kernel.org/stable/c/c5398ce6db7647b7004d73a3102ccc25fb4bb596
	https://git.kernel.org/stable/c/e971d956353d382ee2185d71c47b538501a43f76
	https://git.kernel.org/stable/c/be7dc3650f799a253df4edd4fe230fc9ea4be063
	https://git.kernel.org/stable/c/2ded89ca77fae1da6886fe94831acfe4d6aa80b1
	https://git.kernel.org/stable/c/965a251f23ff69cfb4486974d4532e9bb551c7fc