linux-cve-announce - CVE-2022-49222: drm/bridge: anx7625: Fix overflow issue on reading EDID

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Message-ID: <2025022621-CVE-2022-49222-ad42@gregkh>
Date: Wed, 26 Feb 2025 02:57:07 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49222: drm/bridge: anx7625: Fix overflow issue on reading EDID

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

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

drm/bridge: anx7625: Fix overflow issue on reading EDID

The length of EDID block can be longer than 256 bytes, so we should use
`int` instead of `u8` for the `edid_pos` variable.

The Linux kernel CVE team has assigned CVE-2022-49222 to this issue.


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

	Issue introduced in 5.11 with commit 8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 and fixed in 5.15.33 with commit 64c06df2428bb7bb3d8cf5691416001af42d94dd
	Issue introduced in 5.11 with commit 8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 and fixed in 5.16.19 with commit f0d5d938d51af4eb08d9d8684fd9903425a0a87d
	Issue introduced in 5.11 with commit 8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 and fixed in 5.17.2 with commit db1c47d299298a7c52ccb201905d6be979fd7507
	Issue introduced in 5.11 with commit 8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 and fixed in 5.18 with commit d5c6f647aec9ed524aedd04a3aec5ebc21d39007

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-2022-49222
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/gpu/drm/bridge/analogix/anx7625.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/64c06df2428bb7bb3d8cf5691416001af42d94dd
	https://git.kernel.org/stable/c/f0d5d938d51af4eb08d9d8684fd9903425a0a87d
	https://git.kernel.org/stable/c/db1c47d299298a7c52ccb201905d6be979fd7507
	https://git.kernel.org/stable/c/d5c6f647aec9ed524aedd04a3aec5ebc21d39007