linux-cve-announce - CVE-2024-50291: media: dvb-core: add missing buffer index check

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Message-ID: <2024111954-CVE-2024-50291-5c62@gregkh>
Date: Tue, 19 Nov 2024 02:32:46 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-50291: media: dvb-core: add missing buffer index check

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

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

media: dvb-core: add missing buffer index check

dvb_vb2_expbuf() didn't check if the given buffer index was
for a valid buffer. Add this check.

The Linux kernel CVE team has assigned CVE-2024-50291 to this issue.


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

	Issue introduced in 6.8 with commit 7dc866df4012 and fixed in 6.11.8 with commit 721c37af0355
	Issue introduced in 6.8 with commit 7dc866df4012 and fixed in 6.12 with commit fa88dc7db176

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-2024-50291
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/dvb-core/dvb_vb2.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/721c37af0355cc0b540909c57fd7930dc99c72d8
	https://git.kernel.org/stable/c/fa88dc7db176c79b50adb132a56120a1d4d9d18b