linux-cve-announce - CVE-2022-50383: media: mediatek: vcodec: Can't set dst buffer to done when lat decode error

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Message-ID: <2025091852-CVE-2022-50383-e1c7@gregkh>
Date: Thu, 18 Sep 2025 15:33:57 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50383: media: mediatek: vcodec: Can't set dst buffer to done when lat decode error

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

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

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

media: mediatek: vcodec: Can't set dst buffer to done when lat decode error

Core thread will call v4l2_m2m_buf_done to set dst buffer done for
lat architecture. If lat call v4l2_m2m_buf_done_and_job_finish to
free dst buffer when lat decode error, core thread will access kernel
NULL pointer dereference, then crash.

The Linux kernel CVE team has assigned CVE-2022-50383 to this issue.


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

	Fixed in 6.0.16 with commit eeb090420f3477eb5011586709409fc655c2b16c
	Fixed in 6.1.2 with commit 66d26ed30056e7d2da3e9c14125ffe6049a4f907
	Fixed in 6.2 with commit 3568ecd3f3a6d133ab7feffbba34955c8c79bbc4

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-2022-50383
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/media/platform/mediatek/vcodec/mtk_vcodec_dec_stateless.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/eeb090420f3477eb5011586709409fc655c2b16c
	https://git.kernel.org/stable/c/66d26ed30056e7d2da3e9c14125ffe6049a4f907
	https://git.kernel.org/stable/c/3568ecd3f3a6d133ab7feffbba34955c8c79bbc4