linux-cve-announce - CVE-2024-41024: misc: fastrpc: Restrict untrusted app to attach to privileged PD

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Message-ID: <2024072919-CVE-2024-41024-be39@gregkh>
Date: Mon, 29 Jul 2024 16:32:19 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-41024: misc: fastrpc: Restrict untrusted app to attach to privileged PD

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

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

misc: fastrpc: Restrict untrusted app to attach to privileged PD

Untrusted application with access to only non-secure fastrpc device
node can attach to root_pd or static PDs if it can make the respective
init request. This can cause problems as the untrusted application
can send bad requests to root_pd or static PDs. Add changes to reject
attach to privileged PDs if the request is being made using non-secure
fastrpc device node.

The Linux kernel CVE team has assigned CVE-2024-41024 to this issue.


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

	Issue introduced in 6.2 with commit 0871561055e6 and fixed in 6.6.41 with commit 5e305b5986dc
	Issue introduced in 6.2 with commit 0871561055e6 and fixed in 6.9.10 with commit c69fd8afaceb
	Issue introduced in 6.2 with commit 0871561055e6 and fixed in 6.10 with commit bab2f5e8fd5d

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-2024-41024
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/misc/fastrpc.c
	include/uapi/misc/fastrpc.h


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/5e305b5986dc52122a9368a1461f0c13e1de3fd6
	https://git.kernel.org/stable/c/c69fd8afacebfdf2f8a1ee1ea7e0723786529874
	https://git.kernel.org/stable/c/bab2f5e8fd5d2f759db26b78d9db57412888f187