linux-cve-announce - CVE-2024-53203: usb: typec: fix potential array underflow in ucsi_ccg_sync

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Message-ID: <2024122727-CVE-2024-53203-80fc@gregkh>
Date: Fri, 27 Dec 2024 14:52:49 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-53203: usb: typec: fix potential array underflow in ucsi_ccg_sync_control()

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

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

usb: typec: fix potential array underflow in ucsi_ccg_sync_control()

The "command" variable can be controlled by the user via debugfs.  The
worry is that if con_index is zero then "&uc->ucsi->connector[con_index
- 1]" would be an array underflow.

The Linux kernel CVE team has assigned CVE-2024-53203 to this issue.


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

	Issue introduced in 5.6 with commit 170a6726d0e266f2c8f306e3d61715c32f4ee41e and fixed in 6.11.11 with commit ef92cd55289a282910575c5b9d87f646f2d39b38
	Issue introduced in 5.6 with commit 170a6726d0e266f2c8f306e3d61715c32f4ee41e and fixed in 6.12.2 with commit 56971710cd541f2f05160a84b3183477d34a1be9
	Issue introduced in 5.6 with commit 170a6726d0e266f2c8f306e3d61715c32f4ee41e and fixed in 6.13-rc1 with commit e56aac6e5a25630645607b6856d4b2a17b2311a5

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-2024-53203
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/usb/typec/ucsi/ucsi_ccg.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/ef92cd55289a282910575c5b9d87f646f2d39b38
	https://git.kernel.org/stable/c/56971710cd541f2f05160a84b3183477d34a1be9
	https://git.kernel.org/stable/c/e56aac6e5a25630645607b6856d4b2a17b2311a5