linux-cve-announce - CVE-2024-42313: media: venus: fix use after free in vdec

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Message-ID: <2024081752-CVE-2024-42313-09b9@gregkh>
Date: Sat, 17 Aug 2024 11:10:18 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-42313: media: venus: fix use after free in vdec_close

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

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

media: venus: fix use after free in vdec_close

There appears to be a possible use after free with vdec_close().
The firmware will add buffer release work to the work queue through
HFI callbacks as a normal part of decoding. Randomly closing the
decoder device from userspace during normal decoding can incur
a read after free for inst.

Fix it by cancelling the work in vdec_close.

The Linux kernel CVE team has assigned CVE-2024-42313 to this issue.


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

	Issue introduced in 4.13 with commit af2c3834c8ca and fixed in 6.1.103 with commit da55685247f4
	Issue introduced in 4.13 with commit af2c3834c8ca and fixed in 6.6.44 with commit 66fa52edd32c
	Issue introduced in 4.13 with commit af2c3834c8ca and fixed in 6.10.3 with commit 6a96041659e8
	Issue introduced in 4.13 with commit af2c3834c8ca and fixed in 6.11-rc1 with commit a0157b5aa34e

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-2024-42313
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/qcom/venus/vdec.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/da55685247f409bf7f976cc66ba2104df75d8dad
	https://git.kernel.org/stable/c/66fa52edd32cdbb675f0803b3c4da10ea19b6635
	https://git.kernel.org/stable/c/6a96041659e834dc0b172dda4b2df512d63920c2
	https://git.kernel.org/stable/c/a0157b5aa34eb43ec4c5510f9c260bbb03be937e